Bomb Voyage!!!
DANGIT! I just spent like 15 minutes thinking of who it could be, and finally figured it out when TSS beat me to it. CURSE YOU!!! I was too slow.
I really did have it too … well you beat me to the draw, TSS, by a good 5 minutes or so. That was a good one, Pixart!
I was thinking “wait, which character made an appearence in both Ratatouiile and Incredibles?” I was going through about everything. I wanted to say Lou Ramano and Brad Bird. But then Bomb Voyage was the last character that came to my mind.
yep TSS its bomb voyage
your turn 
Okay guys, try mine.
I find myself moving around a lot.
I went through a drastic change.
is it heimlich from a bugs life 
Syndrome!
Keep guessing. It isn’t heimlich.
Dash?
Jack Jack?
can you tell us if it is a main character or not and who directed the movie
because this is a hard one 
Pixart: I would, but that would give it all away. So I am just going to give you clues relating to this person.
A few more guesses before new clues.
Lightning McQueen?
I wouldn’t say drastic but more a confidence boost haha, Violet?
I dunno, but it sounds like Marlin to me.
I can see it being Marlin.
Is it Gypsy?
She moves around a lot with the circus, and she drasticaly changed into a moth from a caterpillar(?).
Nice guesses everyone, but no one has got the answer yet.
Next clue!
1: I was lied to.
2: In one scene, I was constantly trying not to be seen.
Maybe Atta?
She did change (at first she was mean to Flik, then nicer), she has her duty as Princess, therefore moving around a lot. And Flik lied to her. But I don’t have a clue for the last clue.
It was a good guess WON, but not the right one.
Has anyone guessed Flik yet. that’s my wild guess.