My favorite boss is Army Dillo II, don't ask why, I just like this boss for some reason. If I had a second choice, it would probably be Mad Jack, again, don't ask why.
My favorite boss so far is Dogadon II. The thing that I like is fighting with giant Chunky. Honestly, the bosses in this game were boring and repetitive, and the Mad Jack boss really pissed me off at first. I haven't completed the game, so maybe there's a better boss (I'm on Fungi Forest right now).
Sorry if I'm bumping a little, but Mad Jack gets my vote. Also, FAKE K. Rool's official name is "King Kut Out", so... maybe someone should change it or something.
Kut Out. Whats better than shooting your self or of barrels at card board crocadils while avoiding fake ghosts on a tower with the barrels? NOTHING, thats what.
My favourite boss was definitely the first Dogadon. I mean, it was a freaking DRAGON! I like dragons, haha. Oh, and you fought him with Diddy. Diddy rocks.
And also Mad Jack, or Demented Donald Duck in the Box as I call him. He's quite epic. And King Kutout... that laugh still haunts my memory to this day.
You know, Puftoss was actually pretty cool. I just changed my vote to him. (And all these months later, someone STILL needs to change that to King Kut Out!)
For me, Mad Jack would have to be my favorite boss. I remember so many of the battles my whole family had with him, and the boss himself is hilarious. I mean, he sounds like Donald Duck for goodness sake! I also loved how Tiny's Ponytail Twirl was used during the fight.