Yo. Pokemon stadium is easy as **** to get that edge cancel on, as long as you reverse your up-b. Once you get the positioning down, you can do it so you:
1) land on stage with an edge cancel
2) go OFF stage (yes, even if you're DI'ing towards the stage- it's weird), but still get the edge cancel
What I find to be the case is if you recover a little higher, you get 1, but you sometimes get the landing lag if you start your up-b too high. With 2, it's easier to get, but a little more dangerous, because you're always going to go off stage with it.
With #2, you can theoretically double jump into a bair, as they definitely won't see this coming the first time, or double jump into a waveland. You can probably also just recover straight to the ledge lol because they've probably rolled by now, assuming you to be dead.
Now, if you wanna be the most stylish ************ on the planet, you can edge guard with it. Like @
Coastward
said, you can drop from the ledge --> double jump --> reverse up-b --> edge cancel --> drop zone aerial. When you do this, you win the match automatically because you're a BOSS.
It's amazing what I can get done when I have a final tomorrow.