HARDEST. BOSS. EVAAR.
Probably. After 8976749836 more goes, I finally killed him! And, with his bubble popped, it was time to watch the credits roll… only… what’s this? I only rescued Patty or Tilly or Fluffy or Boris or whatever her name is. “This is not a true ending!” it says. I now need to do it again in two player mode!
Or so I thought. I can actually let the GBA control Bobblen. So off I went to kill Super Drunky Bat Thing again, with “two” players. After a few attempts (Bob’s bubbles kept stunning me and getting me killed, so I only pressed Start to let him join in after I’d bubbled the Drunk), and I completed the game properly. Huzzah! Betty and Sweaty are free!