Bought this game a year ago and I'm on my third playthrough. It was during my first run, that I noticed a few things that I thought should be added to the only FAC listed here. Here's what I found:
The Dronco mini-boss will inhale Dewy if he turns into his Mist form.
The Aquadron mini-boss will remain in his helmet form as long as you are Mist.
The Elecdron mini-boss will shoot his fists at Dewy if he turns into Mist too early.
Caterpiedron can be stunned with lightning when he's just a head.
Anyone else find anything weird?
If you fail in the tug of war sequence when Mothdron's second form grabs you, he will drop Dewy into the lava.
If you fail to break free if you get caught by Geldron's slime, he will do something you don't even want to know to Dewy and do a drop and a half of damage, the most (Besides Hedrons purple drops) in the game.
If you fail during the tug-of-war with Geldron, he will twang Dewy back like a rubber band and turn him back to normal size.
If you get sucked into the black hole or fail at the tug of war sequence when fighting Don Hedron, Dewy will get sucked/thrown into the black hole and then come out above Don Hedron, who will then use Dewy as a flail and slam him into the ground.