Sandstorm to hopefully blast sleep pwder back at Yoshi. Earthquake for MORE DAMAGE, try and time when Yoshi is just starting to exucute vine whip to catch the little thing off
balance. Finnaly use Mud Slap to hopefully deflect the venoshock and if not deal decent damage to that Bulbasaur.
In short Sand Storm (to block sleep powder) - Earthquake (try to catch Yoshi off
balance) - Mudslap