Im looking to improve my Yoshi play. I know how to wavebounce and b-reverse and Im working on using lick as a recovery option. Is there anything special I should be focusing on to get to a high level with Yoshi?
High-tech is nice, but don't forget the basics - specifically, tilts. I'm speaking from past experience having barely utilized these moves when I started; knowing how to incorporate your tilts is very important for Yoshi.
Arguably the most important is your utilt. It's a combo starter, has a hitbox behind you, and it's a relatively safe move. Its main purpose is to pop your opponent above you, where you can wreak havoc with uair, nair, and even a ground pound at the right percents.
Ftilt is a great turnaround option I use frequently upon landing, like if I land with my back turned. It comes out really fast and can usually catch someone by surprise if they're going in for a grab punish.
Finally, dtilt can and should be used often for shield pressure or to trump a recovery. It's fast and has great range, so even if you miss you could jump out of the way to avoid getting punished for it - I almost never get punished on dtilt. Because of its low trajectory, you can put your opponent into a very dangerous position off-stage. Practice using it as a combo finisher, particularly after jab1 or grab release.
My favorite new thing to do is grab as close to ledge as possible, pummel until release (because you're at the ledge, it guarantees they'll be dropped right next to you no matter the percent), dtilt them offstage, run off (don't jump) and fair as soon as you're airborne - I don't know the exact percent per character, but if they're somewhere around the 85-95% range it can guarantee a spike.