Enlarge

From the Super Mario Wiki
Mario using Enlarge
Toadette using Enlarge

Enlarge is a special ability that appears in Mario Super Sluggers, where it is used by Mario, his baby counterpart, and the Toad characters.

Enlarge is activated only during close plays. When the player presses the right button first in a close play, the runner grows larger and knocks away the base defender. This can also knock the ball out of their glove and send it rolling elsewhere on the field, which may allow the other runners to advance a base.