I brought this up many time by E-mailing KI bout this but they never fixed it in the Updates so I guess I decide to report it here.
Wagyu Sanchuros is the crown companion twin of Kobe Yojimbo and Wagyu attack animations during max promotion is still stuck as the basic/first tier attack and no second or third tier attack during max promotion like Kobe.
Hi! Thank you for your report. We are aware that Wagyu's attacks are not similiar to Kobe's, and we'll be fixing it in one of our future updates to the game. Sorry for the inconvenience.