BTD6 Monkey Knowledge: All 134 Upgrades by Tree

Primary Knowledge 32

Fast Tack Attacks
Tack Shooter attack speed increased by 8%.
Increased Lifespan
Longer projectile lifespan for Dart Monkey, Bomb Shooter, Tack Shooter, and Glue Gunner.
Extra Dart Pops
Dart Monkeys get +1 pierce to all shots.
Poppy Blades
Blade Shooter upgrade gets +2 pierce.
Requires: Hard Tacks
Hard Tacks
Tack Shooter tacks can pop Frozen Bloons.
Requires: Fast Tack Attacks
Fast Glue
Glue Gunner 10% increased attack speed.
Requires: Fast Tack Attacks
Fraggy Frags
Frag bombs get 2 extra frags.
Requires: Increased Lifespan
Cheap 'Rangs
Base cost of Boomerang Thrower reduced by 50.
Requires: Increased Lifespan
Crossbow Reach
Crossbow range increased.
Requires: Extra Dart Pops
Big Inferno
Inferno Ring upgrade gets +3 burst radius.
Requires: 5 Knowledge Points Poppy Blades
Icy Chill
Freeze radius slightly increased.
Requires: 5 Knowledge Points Hard Tacks
More Splatty Glue
Glue Splatter can affect up to 8 Bloons per shot.
Requires: 5 Knowledge Points Fast Glue
Budget Clusters
Bomb Shooter's Cluster Bombs cost reduced by 100.
Requires: 5 Knowledge Points Fraggy Frags
Extra Bounce
Increase Boomerang Ricochet to bounce up to 80 times.
Requires: 5 Knowledge Points Cheap 'Rangs
Recurring 'Rangs
Boomerangs that return to the Boomerang Monkey will be thrown a second time.
Requires: 5 Knowledge Points Extra Bounce
4 And 4
Dart Monkey's triple shot gets 4 darts every 4th shot.
Requires: 5 Knowledge Points Crossbow Reach
Force vs Force
Juggernaut does +2 damage per shot to MOAB-Class Bloons.
Requires: 5 Knowledge Points Crossbow Reach
So... Cold...
Ice Monkey's Permafrost upgrade slows by 60%.
Requires: 8 Knowledge Points Icy Chill 250
Aviation Grade Glue
MOAB Glue slows more than normal.
Requires: 8 Knowledge Points More Splatty Glue 250
Mega Mauler
MOAB Mauler does more damage per hit.
Requires: 8 Knowledge Points Aviation Grade Glue Hard Press 250
Hard Press
MOAB Press special knockback boomerangs push back 30% further.
Requires: 8 Knowledge Points Extra Bounce 250
Master Double Cross
Allows you to have TWO Crossbow Masters.
Requires: 8 Knowledge Points 4 And 4 250
Big Cryo Blast
Cryo Cannon gets increased blast radius.
Requires: 10 Knowledge Points So... Cold... 500
Hypothermia
Snowstorm freezes Bloons for longer.
Requires: 10 Knowledge Points So... Cold... 500
Cheaper Solution
Bloon Liquifier cost reduced by 1000.
Requires: 10 Knowledge Points Aviation Grade Glue 500
Violent Impact
Bomb Shooter's Bloon Impact stuns for 25% longer.
Requires: 10 Knowledge Points Budget Clusters 500
Long Turbo
Boomerang Turbo Charge ability lasts 15 seconds.
Requires: 10 Knowledge Points Hard Press 500
Bionic Augmentation
While Turbo Charge is active, Bionic Boomerang is able to target Camo Bloons
Requires: 10 Knowledge Points Long Turbo 500
Come On Everybody!
Primary towers attack 5% faster if all are below tier 3, and cost 5% less if all are tier 3 or 4.
Requires: 10 Knowledge Points Master Double Cross 500
Bonus Monkey!
Start each game with a free Dart Monkey!
Requires: 10 Knowledge Points Come On Everybody! 1000
Bonus Glue Gunner
Start each game with 1 free Glue Gunner! (Only 1 free Monkey Tower per game)
Requires: 10 Knowledge Points Cheaper Solution 1000
More Cash
Increase starting cash by 200.*
Requires: Cheaper Solution Bonus Monkey! 1000

Military Knowledge 30

Naval Upgrades
Monkey Buccaneer and Monkey Sub get +1 pierce per shot.
Airforce Upgrades
Monkey Ace and Heli Pilot get +1 pierce per shot.
Elite Military Training
All Military Monkeys get a one-off +1000 XP and earn XP in-game 5% faster permanently.
Emergency Unlock
Activated ability: unlocks locked Dartling Gunners and boost their swivel speed for a short time.
Big Bunch
Grape Shot shoots 6 grapes.
Requires: Naval Upgrades
Accelerated Aerodarts
Darts from Monkey Aces fly faster.
Requires: Airforce Upgrades
Ceramic Shock
Sniper hits on Ceramic Bloons slow them down briefly.
Requires: Elite Military Training
Breaking Ballistic
Ballistic Missiles do more damage to Ceramic Bloons.
Requires: 4 Knowledge Points Naval Upgrades
Faster Takedowns
MOAB Takedown Ability has 5 second faster cooldown.
Requires: 4 Knowledge Points Big Bunch
Targeted Pineapples
Pineapples are only dropped near tracks.
Requires: 4 Knowledge Points Accelerated Aerodarts
Rapid Razors
Razor Rotors pop Bloons faster.
Requires: 4 Knowledge Points Airforce Upgrades
Extra Burny Stuff
Burny Stuff pops every second.
Requires: 4 Knowledge Points
Cheaper Maiming
Maim MOAB cost reduced by 1000.
Requires: 4 Knowledge Points Ceramic Shock
Gorgon Storm
Hydra Rocket Storm stuns damaged Bloons for a short time.
Requires: 4 Knowledge Points Emergency Unlock
Quad Burst
Airburst Darts split into 4 instead of 3.
Requires: 8 Knowledge Points Breaking Ballistic 250
Trade Agreements
Merchantman generates +$20 per round.
Requires: 8 Knowledge Points Faster Takedowns 250
Gun Coolant
Monkey Aces attack 10% faster.
Requires: 8 Knowledge Points Targeted Pineapples 250
Paint Stripper
Mortar shattering shells removes Fortification from DDT Bloons.
Requires: 8 Knowledge Points Extra Burny Stuff 250
Cross the Streams
Where Plasma or Doom beams cross on the track they create temporary plasma pools.
Requires: 8 Knowledge Points Gorgon Storm 250
Flanking Maneuvers
Sniper, Monkey Sub & Monkey Buccaneer attack 10% faster when set to 'Last' targeting priority.
Requires: 8 Knowledge Points Quad Burst Trade Agreements 500
Wingmonkey
Advanced flight pathing that coordinates multiple Monkey Aces on staggered attack runs.
Requires: 8 Knowledge Points Aeronautic Subsidy 500
Aeronautic Subsidy
Monkey Ace tier 5 upgrades cost 10% less.
Requires: 8 Knowledge Points Gun Coolant 500
Charged Chinooks
Chinook Activated Abilities give 25% more lives and cash.
Requires: 8 Knowledge Points Rapid Razors 500
Budget Battery
Artillery Battery cost reduced by 600.
Requires: 8 Knowledge Points Paint Stripper 500
Master Defender
Elite Defender has no cooldown.
Requires: 8 Knowledge Points Cheaper Maiming 500
Sub Admiral
Sub Commander affects all Monkey Subs on screen.
Requires: 14 Knowledge Points Flanking Maneuvers 1000
Military Conscription
Purchase price of first Military Monkey each game is two thirds the normal.
Requires: 14 Knowledge Points Trade Agreements 1000
Door Gunner
Special Poperations Heli allows tier 4 and below Monkey Towers to attack Bloons while in transit.
Requires: 14 Knowledge Points Charged Chinooks 1000
Advanced Logistics
All Military Monkeys base costs reduced by 5%.
Requires: 14 Knowledge Points Aeronautic Subsidy Door Gunner 1000
Big Bloon Sabotage
All MOAB-Class Bloons spawn in a partially damaged state.
Requires: 14 Knowledge Points Sub Admiral Master Defender 1000

Magic Knowledge 22

SUPER Range
Increased range for the Super Range upgrade
Lingering Magic
Longer projectile lifespan for Wizard Monkey, Super Monkey, Ninja Monkey, and Druid.
Magic Tricks
Guided Magic and Intense Magic cost 25 less.
Cheaper Doubles
Ninja Double Shot cost reduced by 100.
Requires: SUPER Range
Heavy Knockback
Bloons hit by Knockback from Super Monkey are knocked back slightly harder.
Requires: SUPER Range
Hot Magic
All Magic type towers can pop Frozen Bloons.
Requires: Lingering Magic
Speedy Brewing
All Alchemist's potions have 5% faster reload time.
Requires: Magic Tricks
Mo' Monkey Money
Earn 10% extra Monkey Money from game wins on any difficulty.
Requires: Speedy Brewing
Diversion Tactics
Increased chance to distract Bloons from Distraction upgrade.
Requires: 4 Knowledge Points Cheaper Doubles
Strike Down The False
Sun Avatar can pop Purple Bloons.
Requires: 4 Knowledge Points Heavy Knockback
Warm Oak
Heart of Oak cost reduced by 100.
Requires: 4 Knowledge Points Hot Magic
Flame Jet
Dragon's Breath flame projectiles move much faster.
Requires: 4 Knowledge Points Hot Magic
Strong Tonic
Transforming Tonic lasts longer.
Requires: 4 Knowledge Points Speedy Brewing
Cold Front
Ball Lightning's additional lightning bolts also freeze Bloons.
Requires: 4 Knowledge Points Warm Oak 250
Arcane Impale
Arcane Spike does extra damage to MOAB-Class and Ceramic Bloons.
Requires: 4 Knowledge Points Flame Jet 250
Acid Stability
Alchemists' acid pools last 5 second longer.
Requires: 4 Knowledge Points Strong Tonic 250
X-Ray Ultra
Ultravision allows Super Monkeys to see through and fire through blocking objects
Requires: 4 Knowledge Points Strike Down The False 250
Deadly Tranquility
Bloonjitsu and Grandmaster Ninja get an extra shuriken per throw.*
Requires: 8 Knowledge Points Diversion Tactics 500
There Can Be Only One
There can be only one.
Requires: 8 Knowledge Points X-Ray Ultra 500
Vine Rupture
Grants Spirit of the Forest Druid a new ability to burst all track vines, doing big damage to all non-lead Bloons. New vines will regrow after each Rupture.
Requires: 8 Knowledge Points Cold Front 500
Tiny Tornadoes
Druid tornadoes spawn 3 smaller tornadoes when they expire.
Requires: 8 Knowledge Points Deadly Tranquility Vine Rupture 1000
Mana Shield
Creates a special shield that absorbs up to 25 lives for free. Recharges slowly each round if no Bloons leak.
Requires: 8 Knowledge Points Arcane Impale 1000

Support Knowledge 22

Flat Pack Buildings
Banana Farms and Monkey Village cost 2% less and sell for 2% more.
One More Spike
Spike Factory stacks get +1 spike.
Insider Trades
Monkey Business discount increases by 2%
Requires: Flat Pack Buildings
More Valuable Bananas
Valuable Bananas upgrade increases to 30%.
Requires: Flat Pack Buildings
First Last Line of Defense
Purchased price of first Spike Factory each game is $150 less.
Requires: One More Spike
Bigger Banks
Monkey Banks can hold 2500 extra money.
Requires: 3 Knowledge Points Insider Trades
Farm Subsidy
First Banana Farm each game costs 100 less.
Requires: 3 Knowledge Points More Valuable Bananas
Vigilant Sentries
Sentry Turrets last longer than normal
Requires: 3 Knowledge Points One More Spike
Monkey Education
All Monkeys XP earn rate increased by 8%.
Requires: 3 Knowledge Points
Backroom Deals
IMF Loan grants $1000 more and repay rate is 40%.
Requires: 3 Knowledge Points Bigger Banks 250
Inland Revenue Streams
Monkey Town cash bonus increased by 10%.
Requires: 3 Knowledge Points Farm Subsidy 250
Thicker Foams
Cleansing Foam can hit 3 more Bloons before expiring.
Requires: 3 Knowledge Points Vigilant Sentries 250
Very Shreddy
MOAB-SHREDR spikes deal +1 extra damage to MOAB-Class Bloons.
Requires: 3 Knowledge Points First Line of Defense 250
To ARMS!
Call to Arms duration increased by 3 seconds.
Requires: 3 Knowledge Points Monkey Education 250
Better Sell Deals
All Monkeys sell for 5% more.
Requires: 8 Knowledge Points Backroom Deals 500
Healthy Bananas
Marketplaces now produce 1 life per round and Central Markets produce 3.
Requires: 8 Knowledge Points Inland Revenue Streams 500
Big Traps
Bloon Trap can hold up to 530 RBE.
Requires: 8 Knowledge Points Thicker Foams 500
Hi-Value Mines
Spiked Mines cost reduced by 1500.
Requires: 8 Knowledge Points Very Shreddy 500
Veteran Monkey Training
All Monkeys reload time reduced by 3%.
Requires: 8 Knowledge Points To Arms! 500
Global Ability Cooldowns
All Ability cooldowns for all Monkeys reduced by 3%.
Requires: 8 Knowledge Points To Arms! 500
Bank Deposits
Tier 4 and above Monkey Banks can take deposits from available in game cash.
Requires: 14 Knowledge Points Better Sell Deals 1000
Paragon of Power
Paragons attack faster if there are no Tier 5 of the same tower.
Requires: 14 Knowledge Points Veteran Monkey Training 1000

Heroes Knowledge 13

Heroic Reach
All heroes get slightly increased range.
More 'Splody
Heroes' explosives get +2 pierce per shot.
Ability Discipline
Hero level 10 Ability cooldowns reduced by 10%.
Heroic Velocity
All Heroes' projectile speeds increased slightly.
Requires: Heroic Reach
Scholarships
Hero training costs reduced by 10%.
Requires: More 'Splody
Quick Hands
Makes all heroes attack 4% faster.
Requires: 3 Knowledge Points Heroic Velocity
Self Taught Heroes
Heroes earn XP 10% faster.
Requires: 3 Knowledge Points Scholarships
Ability Mastery
At level 20, Heroes' level 3 Ability cooldown reduced by 30%.
Requires: 3 Knowledge Points Ability Discipline
Hero Favors
Heroes' base cost reduced by 10%.
Requires: 3 Knowledge Points Quick Hands Self Taught Heroes 250
Empowered Heroes
Heroes start each game at level 3.
Requires: 8 Knowledge Points Hero Favors 500
Big Bloon Blueprints
Heroes do +1 extra damage to MOAB-Class Bloons with their base attack.
Requires: 8 Knowledge Points Ability Mastery 500
Monkeys Together Strong
Heroes receive 5% more experience per each Hero placed.
Requires: 8 Knowledge Points Empowered Heroes 1000
Weak Point
All Heroes deal +1 damage to Ceramic & Fortified Bloons.
Requires: 8 Knowledge Points Big Bloon Blueprints Monkeys Together Strong 1000

Powers Knowledge 15

Bigger Camo Trap
Camo Trap lasts for 600 Bloons.
Just One More
Road Spike piles have 21 spikes in them.
Cheaper Lakes
Portable Lake costs 40 Monkey Money.
Mauling MOAB Mines
MOAB mine does extra damage.
Requires: Bigger Camo Trap
Longer Time Stop
Time Stop lasts longer than normal.
Requires: Just One More
Budget Pontoons
Pontoon costs 40 Monkey Money.
Requires: Cheaper Lakes
Supersize Glue Trap
Glue Trap can slow MOAB-Class Bloons, though the bigger the bloon, the more glue is used up.
Requires: 3 Knowledge Points Mauling MOAB Mines
Longer Boosts
Monkey Boost lasts longer.
Requires: 3 Knowledge Points Longer Time Stop
Powerful Monkey Storm
Super Monkey Storm does more damage.
Requires: 3 Knowledge Points Budget Pontoons Longer Boosts
Ambush Tech
Tech Bot gains a targeting option to trigger only when Bloons enter a specific track area.
Requires: 3 Knowledge Points Supersize Glue Trap 250
Pre-Game Prep
Start each game with a pile of permanent Road Spikes at the end of the track.
Requires: 3 Knowledge Points Longer Boosts 250
Fit Farmers
Monkey Farmers have larger radius.
Requires: 3 Knowledge Points Powerful Monkey Storm 250
Budget Cash Drops
Cash Drops cost 20 Monkey Money less.
Requires: 3 Knowledge Points Fit Farmer 500
Supa-Thrive
Thrive adds 30% instead of 25%.
Requires: 3 Knowledge Points Fit Farmer 500
Grand Prix Spree
Monkey Money cost to enter Races is reduced by 10%.
Requires: 10 Knowledge Points Budget Cash Drops 1000

All Monkey Knowledge

Primary (row 3) 8

Heroes 13

Military (row 2) 3

Magic (row 4) 4

Military (row 6) 4

Military (row 5) 6

Military (row 1) 4

Powers 15

Primary (row 4) 5

Support 22

Military (row 6, final) 1

Big Bloon SabotageBig Bloon Sabotage in BTD6: all MOAB-class bloons spawn with 10% less health (bosses excluded). Huge for freeplay;…

Primary (row 5) 7

Primary (row 6) 2

Military (row 3) 7

Primary (row 2) 6

Magic (row 2) 5

Military (row 4) 5

Magic (row 5) 3

Magic (row 3) 5

Primary (row 1) 3

Magic (row 1) 3

Magic (row 6) 2

Primary (row 7, final) 1

More CashMore Cash in BTD6: +$200 starting cash in every game ($650 to $850). Cost, full unlock path, co-op…

Guide

Monkey Knowledge (MK) is BTD6's permanent upgrade system for your whole account. You spend Monkey Knowledge Points on small bonuses spread over six trees, and those bonuses apply in every game where MK is allowed: extra starting cash, cheaper towers, more pierce, faster heroes and much more. It is the main reason a late-game account plays very differently from a fresh one.

How to earn Monkey Knowledge Points

Levelling up. From level 30 you earn one Knowledge Point per player level, except at levels 33 and 36. This is where most of your points come from, so every game you play counts.
Achievements. A handful of achievements pay Knowledge Points. The biggest are Ultimate Bloons Master (beat 15 maps on CHIMPS, 4 points), 2TC (beat CHIMPS with only two towers, 2 points) and Superior Bloons Master (5 CHIMPS maps, 2 points). Bloons Master, Sapper, Rising Star, Monkey Philanthropist, All for one and one for one, A year in the making and Mid Season give 1 point each.
Shop. Points and an early Knowledge unlock can also be bought, but this is optional.

In total, 138 points can be earned without paying, which is enough to unlock everything.

How Monkey Knowledge costs work

Every knowledge costs exactly one point, but deeper rows have two extra conditions:

Points in that tree. From the third row down, you need a minimum number of points already spent in the same tree. For example, the lowest row of the Military and Support trees needs 14 points invested in that tree.
A one-time Monkey Money fee. Rows four, five and six cost 250, 500 and 1,000 Monkey Money the first time you unlock a knowledge there.

Each knowledge also has a parent: you must own the one above it (shown by the connecting line) before you can buy it.

Can you reset Monkey Knowledge?

Yes. A respec costs 2,000 Monkey Money and refunds every Knowledge Point you have spent. The Monkey Money you paid for deep knowledge is not lost: those knowledges stay paid for, so re-buying them later only costs a point.

You can also toggle knowledge for free. The MK menu lets you switch all knowledge off and on again, or disable single knowledges, without refunding anything. Use this to turn off a bonus you do not want in a specific game.

The six Monkey Knowledge trees

Primary

The Primary tree boosts Primary towers such as the Dart Monkey, Boomerang Monkey, Bomb Shooter, Tack Shooter, Ice Monkey and Glue Gunner, but its bottom row helps every game. Bonus Monkey! starts each game with a free Dart Monkey, Bonus Glue Gunner with a free Glue Gunner (only one free tower per game), and More Cash raises starting cash by $200, from $650 to $850 in most modes. Master Double Cross lets you own two Crossbow Masters, and early picks like Extra Dart Pops make the starting Dart Monkey noticeably stronger.

Military

Military boosts Military towers such as the Sniper Monkey, Monkey Sub, Monkey Buccaneer, Monkey Ace, Heli Pilot, Mortar Monkey and Dartling Gunner. The standouts are Military Conscription (your first Military tower each game costs two thirds of its price), Advanced Logistics (all Military towers 5% cheaper) and Big Bloon Sabotage, which makes every MOAB-class Bloon spawn already damaged. Elite Military Training speeds up XP for Military towers, which matters when you are still unlocking upgrades.

Magic

Magic boosts Magic towers such as the Wizard Monkey, Super Monkey, Ninja Monkey, Alchemist and Druid. The first stop for most players is Mo' Monkey Money: +10% Monkey Money from every game win, reached in three points via Magic Tricks and Speedy Brewing. Deeper down, Mana Shield absorbs up to 25 lives for free and slowly recharges, and Hot Magic lets every Magic tower pop frozen Bloons.

Support

Support boosts Support towers such as the Banana Farm, Spike Factory and Monkey Village, plus several bonuses that affect every tower. Veteran Monkey Training cuts reload time of all towers by 3%, Global Ability Cooldowns cuts all ability cooldowns by 3%, Better Sell Deals makes every tower sell for 5% more and Healthy Bananas gives lives from Marketplaces and Central Markets. At the bottom, Bank Deposits and Paragon of Power are late-game essentials.

Heroes

The Heroes tree is short (13 knowledges) and every hero player should finish it. Empowered Heroes starts heroes at level 3, Hero Favors cuts hero base cost by 10%, Self Taught Heroes adds 10% hero XP, and Big Bloon Blueprints and Weak Point add bonus damage to MOAB-class, Ceramic and Fortified Bloons.

Powers

The Powers tree improves the consumable Powers. It is the least important tree, but a few nodes are worth it: Pre-Game Prep gives a free pile of permanent Road Spikes at the end of the track every game, Powerful Monkey Storm and Supa-Thrive upgrade popular Powers, and Grand Prix Spree cuts the Monkey Money cost of Race entries by 10%.

Best Monkey Knowledge to get first

There is no single correct order, but these routes give the most value for the points.

New players and Monkey Money grinders

Mo' Monkey Money first. It pays for itself across every win and helps fund the Monkey Money fees deeper in the trees.
Start the Primary tree toward Bonus Monkey! and More Cash. Free early towers and $200 extra starting cash make every map easier, especially on Hard.
Grab cheap early nodes for the towers you already use, such as Extra Dart Pops or Naval Upgrades.

Hero players

Finish the Heroes tree early: Hero Favors, Self Taught Heroes and Empowered Heroes make your hero cheaper, start higher and level faster.

Economy and farming players

Take Flat Pack Buildings and Farm Subsidy early, then work down to Better Sell Deals, Healthy Bananas and Bank Deposits.

Boss Events, Paragons and freeplay

Paragon of Power makes Paragons attack about 20% faster when no tier 5 of the same tower is on the map, which is huge in Boss Events. Big Bloon Sabotage is close to mandatory for deep freeplay. Add Veteran Monkey Training and Global Ability Cooldowns for a flat boost to everything. See Paragons for how Paragon degrees work.

Knowledge you may want to switch off

Most MK is pure upside, but a few nodes can hurt in specific situations. Toggle them off for that game:

Big Bloon Sabotage: lower blimp health means your towers deal less total damage, which slightly lowers Paragon degree when you plan to build a Paragon.
Emergency Unlock: can get in the way of ability hotkeys if your Dartling Gunners are not on normal targeting.
Cross the Streams and Acid Stability: the extra pools add lag in long freeplay games for little damage.
Targeted Pineapples: on maps with very short tracks it can reduce how often pineapples drop.

Monkey Knowledge in CHIMPS and challenges

Monkey Knowledge is completely disabled in CHIMPS, including Mo' Monkey Money. That changes many strategies: no free Dart Monkey, no extra starting cash, no cheaper Military towers. When you practise a strategy for a CHIMPS medal, turn all knowledge off with the toggle so the run plays like the real thing.

Daily Challenges, custom challenges and some events can also disable MK through their rules. Everywhere else, including Impoppable, your knowledge is active. Every tower and hero page in this wiki lists the knowledge that affects it. For full challenge solutions, check the BTD6 Master YouTube channel.

Frequently asked questions

When do you unlock Monkey Knowledge in BTD6?

You start earning Knowledge Points at player level 30, one per level except levels 33 and 36. Some achievements and Shop purchases also give points.

How many Monkey Knowledge Points are there?

You can earn 138 points for free through levels and achievements, and each knowledge costs one point, so you can unlock every knowledge without paying.

How do you reset Monkey Knowledge?

Use the respec option in the Monkey Knowledge menu. It costs 2,000 Monkey Money and refunds all points, while Monkey Money already paid for deep knowledge stays paid.

Does Monkey Knowledge work in CHIMPS?

No. All Monkey Knowledge, including Mo' Monkey Money, is disabled in CHIMPS.

What Monkey Knowledge should I get first?

Mo' Monkey Money, then the Primary route to Bonus Monkey! and More Cash. Hero players should also finish the Heroes tree early.

Which tree is the least useful?

The Powers tree, since Powers are consumables you may rarely use. Pre-Game Prep and Grand Prix Spree are its most useful nodes.

Can I turn off a single knowledge?

Yes. You can toggle individual knowledge, or all of it, on and off for free in the MK menu.