Rounds
Round 20
Round 20 in BTD6: 6 Black Bloons, 66 RBE. The first explosion-immune bloons, with cash and how to beat them without bombs.
Guide
Round 20 is just 6 Black Bloons released over about five seconds. It is the first round with black bloons, which are immune to explosions. That is why round 20 is famous for catching players who built nothing but Bomb Shooters or Mortar Monkeys. Each black pops into two pinks, so the round is worth 66 RBE.
Bloons in round 20
- 6 × Black Bloon (0.0s–5.3s)
Total: 6 bloons worth 66 RBE. Popping everything pays $66, plus the $120 end-of-round bonus.
How to beat round 20
You need any damage that is not explosive. Sharp, magic and most other damage types work.
- A Dart Monkey, Tack Shooter, Ninja Monkey, Boomerang Monkey or Wizard Monkey all pop blacks normally.
- Most heroes deal non-explosive damage and can carry this round alone.
- Once a black is popped, its two pinks are ordinary pinks, so your bombs can help with those.
If you play CHIMPS or Impoppable, double-check this round before you start it. A defence of only bombs and mortars leaks all six blacks.
Alternate Bloons Rounds
ABR round 20 uses the same 6 blacks, but all of them are Regrow Black Bloons. Popping them down to pink and letting them escape your range gives them time to grow back to black.
- 6 × Regrow Black Bloon (0.0s–5.3s)
ABR total: 6 bloons, 66 RBE.
Frequently asked questions
Why can't my bombs pop round 20?
Round 20 is all Black Bloons, and black bloons are immune to explosive damage. Add a tower with sharp or magic damage.
What is in round 20 BTD6?
6 Black Bloons, 66 RBE in total.
When do black bloons first appear?
Black Bloons first appear on round 20 in normal rounds and on round 7 in Alternate Bloons Rounds.