Never actually got the name of this movie and only saw it randomly on telly once.
What I remember is this alien race fighting a war lost a super powerful sentient powersuit on Earth, then this random kid finds it and gets inside. Shenanigans then ensue.
I remember the suit would talk to the kid through a weird face on the inside and the kid tries to teach it the meaning of fun, the suit faked that it was about to blow up in a bad first try at a joke.
There were also pitfalls in eating where they got a burger from a drive-thru on the rocket skates mode (of course) and the suit compressed it down into a weird ball, then when the kid needed to pee it turned out the alien it was made for goes through a nozzle on the chest so he has to go ask his schoolteacher to somehow bodge it so he can go.
Then evil alien shows up and there's some fight in fairground, where the kid saves his crush from a broken space themed ride, and tries to fight the alien by turning the suit's hands into hammers.
The movie ends with alien getting blown up and the suit getting handed off to good guy aliens, as it tells a slightly better joke.