I'll try to make time to play you.
But, I can't promises. Anyways.
Here's some basic combos every Yoshi does:
-REF stance. Hit A. Then Doorknock 2 times. Then 3B.
-214A. Then Doorknock. Then 3B.
-Dragonfly stance. Hit A to stun. Then hit K. Then doorknock. Then 3B.
Or B. Then 3B. Then earslicer.
Practice these combos. Then challenge Pocky Yoshi when ready.