Shrink Stomp

Shrink Stomp is a badge in Paper Mario and Paper Mario: The Thousand-Year Door. In Paper Mario, it is in the Toad Town Tunnels inside a treasure chest and guarded by a Blooper. In Paper Mario: The Thousand-Year Door, it is found in The Great Tree, in the room with water that needs to be drained out, can be bought from the Lovely Howz of Badges for seventy-five coins, and is rarely dropped after battle by Buzzy Beetles, Spike Tops, and X-Nauts. If Mario equips this badge, he gains the ability to use the Shrink Stomp move, which is a jump attack, for two FP. If the action command is timed correctly, upon landing the attack, Mario's target is shrunk, physically reducing their size and decreasing the damage of their attacks by half for two turns. In Paper Mario: The Thousand-Year Door, equipping multiple copies of the badge increases the amount of FP needed to use the move, but also increases the amount of turns the enemy stays shrunk and the move's damage.

Merluvlee's prediction in Paper Mario

 * "I see...a Shrink Stomp Badge. You descend into the Private pipe in Toad Town, then head right on the underground path. You break a block and continue. You find a treasure chest containing the Badge. But beware! For I see a nasty enemy protecting the chest. You must defeat this dreaded creature to reach the Badge."