As an aside, wavebounced Rock Smash is neat, and I think it has some promise, especially against characters that we have trouble dealing with their short-hop spacing tools, like Wolf and Wario. Also, perhaps it could function as a useful anti-juggle tool that allows us to punish people attempting to keep us in the air quite hard. One thing that's sure to be useful with it is baiting at the ledge, for people who expect to punish an airdodge onto the level or an aerial. Jump toward the ledge a bit and then wavebounce Rock Smash. If they're aiming to hit at the ledge, you'll avoid it and hit them. While a simple B-Reversed Rock Smash is easier and safer in general, the fact that you're moving onto the stage before the wavebounce will make people try to punish in a way that you could never elicit via moving away from the ledge and B-Reversing.
It's incredibly simple with B-Sticking, but that takes away Squirtle's Hydrograb, so I feel like doing it the difficult way is necessary. Jump Forward -> press Back+B -> immediately hold Forward.