R.O.A.D.

The R.O.A.D. (Robot Of mAssive Destruction) has 89199 lives. He is the boss on level 90 of btd 6 but on level 140 of btd 7. He appears in bloons 3 dawn of time at the end talking to M.O.D. but you don't battle him. His attacks are: sabotage - Pauses all your towers for 5 minutes (exept Turbo towers.)