I'm not sure if this is up or not, but yoshi has some hard s***.
Yoshi Chaingrab:
one of his techniques is a new chain grab whenever you grab a certain person (metaknight, wario, falco, etc..) and just keep on pressing A. DO NOT THROW THEM. They will soon be released out of ur mouth then run to them and grab again, etc..
Egg Reversal:
This one has many names. You just run to one direction, then quickly use bup and turn at the same time. It causes yoshi to slide in or out or if ur near the ledge u can slide to it and grab it.
Dragonic Rush:
This technique is too hard for me to do now. All I know is that it causes 50 damage.
You must shorthop, nair, then fsmash literally at the same time.