Oh yeah that! That's a pretty awesome use of it since Usmash pokes through the platforms and is a pretty great punish all around. Haven't tried it on other stages yet though.
The thing I was mostly complaining about was Confusion apparently not really setting up into anything when in the more...
Wanna say that a lot of these otherwise cool textures are kinda oversaturated. Nothing wrong with color, but Brawl's style is pretty washed-out. Also, be sure not to lose too much detail when saturating things!
It's a (really easy) tech Bowser has left over from vBrawl. You basically can jump forever if you Koopa Hop, which is just pressing jump right before you hit the ground while in SideB endlag.