Your Yoshi is good, but not as crazy as powerful.
Name: Master and Crazy Yoshis
Looks: Master Yoshi - A black Yoshi that wears a red scarf with a black Starman logo emblazoned on its middle and red gloves. Crazy Yoshi - A brown Yoshi with a blue hoodie and pink slippers.
Powers: Both Yoshis have black Yoshi's powers, except they have abilities identical to their counterparts. The egg they hatch from is 2x-sized, while its pattern is black and brown dots on white. When riding one Yoshi, the CPU controls the other as long as the gamemode is 0 or at least 1 player is riding the CPU-controlled Yoshi's friend. After eating 20 enemies and at least one of the Yoshi is dismounted, they fuse into Yoshphys, a 2x-sized yellow Yoshi that controls like Mega Mario, hates mini players, puts the remaining player on its saddle, wears a lab coat under its saddle and lasts an hour before splitting back into Master and Crazy Yoshis.
P.S. This is my first contribution to this forum game that features multiple Yoshis at once.