Bullet Bill Blast
From the Super Mario Wiki
Bullet Bill Blast is Shy Guy's Skillshot in Mario Strikers Charged. Once fully charged, Shy Guy will jump on a Bullet Bill and head toward the goal. It will explode, knocking out every character in within blasting range, including Shy Guy and the Kritter . Shy Guy, however, recovers earlier than all the other characters, including the goalie, and has the opportunity to kick the ball into the goal.