Power Smash

Power Smash is a badge in Paper Mario and Paper Mario: The Thousand-Year Door. In Paper Mario, it is in the Toad Town Tunnels, behind some destroyable blocks, and is only accessible after Mario obtains the Super Hammer. In Paper Mario: The Thousand-Year Door, it is given by Professor Frankly, serving as a tutorial on how to equip and use badges, can be bought at the Pianta Parlor for thirty-four Pianta Tokens, and can be rarely dropped after battle by Buzzy Beetles, Spike Tops, Spinias, Spanias, and Spunias. If Mario equips the badge, he is able to use Power Smash, a hammer attack that requires two FP to use. If the action command is timed correctly, Mario deals a single hammer attack that deals two more points of damage than a regular timed hit with a hammer. Unlike other hammer moves (excluding Piercing Blow), the move has multiple Stylish Moves that make Mario perform multiple backflips in succession, if timed correctly. Equipping multiple copies of the badge increases the amount of FP required to use it, but also increases the move's damage by one for each equipped badge.

Merluvlee's prediction in Paper Mario

 * "I see...a Power Smash Badge. You enter the Private pipe in Toad Town and head left, smashing blocks as you go. You enter a pipe and continue left once you emerge. After breaking a block to make a jump pad fall, you leap up to the Badge's resting place."