If you realy whant to go super high in the sky here is the way.Grab a banshee and tip it over.Next grab a rocket launcher and go on the wing thats on the ground.After you do that go on the tipof the wing take out your rocket launcher and shoot the tip of the wing facing up in the air and shoot it.If you do this properly yoo will go flying in the air.

If you realy want to unlock mewtwo go to melee mode and put 1 and 2 player against each other with no time and items.Leav your game cube on over night.When you wake up kill player 2 and you will need to face mewtwo.GOOD LUCK

If you are having trouble with unlocking vehicles here is a hint.Try playing road rage you get points for two differant modes.