Round 15

Round 15 is a round introduced in Bloons TD 6. It is characterised by the introduction of Pink Bloons.

Description
Round 15 spawns spaced red bloons at first, then sends blue bloons on top, then some green bloons on top of that, then yellow bloons on top of all previous spawns, and then 5 Pink Bloons.

Strategy
Round 15 is a difficult round, due to the amount of stacking. High pierce or damage towers tend to clear the round easily, especially Airburst Darts or even Twin Guns.

Tips

 * As mentioned above, a single Airburst Darts will steamroll the entirety of the round, due to the extreme damage per hit and high attack rate.
 * On maps where water is limited or zero, a 2-0-1 Ninja Monkey will help with defeating the round, and, on easier maps, solo it.
 * Other moderate-high pierce/damage towers like Triple Shot will also be invaluable against this round.