I've got a couple questions. Before you can answer them, I'm sure you need an explanation.

What I want to do is replace Charizard's side-b with a gust of wind attack, preferably with a range of around 1/3 the size of Final Destination. The problem I'm having is manifold: For one thing, when I use side-b in game, he does the animation OK, but his tail sticks into the ground. WackaAlpaca was gonna do a tutorial on how to remedy this, but he never did, and no matter where I try looking, I can't seem to find out how to prevent this.

The other thing is, I'm not 100% sure how I should go about making the attack work. There's one thing things concerning me at the moment:
The action for side-b.



I assume this will have Charizard do something with his original side-b, but I'm not entirely sure what, since I haven't really been doing this for very long at all. What, if anything, should I change about this?

I've looked all over, and I'm sure there is some place that will tell me how to do this if I keep looking, but I'm at my wit's end.

I'm trying to swap an animation for Charizard, specifically his side-b with his f-air. It looks fine in Brawlbox, but his tail, feet, and rear end stick into the ground.

How do I prevent them from doing that? Or can someone point me to a tutorial that will tell me?