While the insults in Monkey Kombat made you lose energy/bananas, the draws made you and your opponent regain energy/bananas. (?)
Since the ultimate insult and monkey insults are pretty much the same (just in a different scale) you can replace "energy/bananas" with moral energy? maybe? (??) Yeah its weird but you asked for it.
That way, by making 3 draws you made Lechuck s moral energy to be full again (???)...uhh...yeah...whatever.
Anyway, just look at LeChuck, for me its pretty clear he was back to normal at the end.