In the Paper Mario series, Whackas are rare, blue mole-like creatures. Hitting one on the head with a hammer or jumping on them makes a Whacka Bump appear, a useful health item restoring 25 HP and 25 FP. If they are attacked eight times, they recede into the ground, releasing a few coins. After this point, Whacka disappears and the player cannot obtain any more Whacka Bumps in that particular save file. However, if you attack Whacka
times in each of the four save files in the original Paper Mario, whacking them for the eighth time on the fourth save file will trigger a battle sequence in which
will curse Mario out with vulgar language for his continued abuse and attempt to reclaim their dignity through combat. Whacka is the hardest enemy in the game with Max HP: 800, Attack Power: 25, and Defense Power: 0. They are stronger than The Master of the Toad Town Dojo in his final 3rd form and the final boss, Bowser (in his powered-up state), combined. Whacka primarily attacks by throwing Whacka Bumps at Mario, delivering a devastating 25 damage points with each successful hit, but can also breathe fire. While Whacka is the strongest opponent in the entire game, they are completely optional, much like Bonetail in the sequel - thus they are the game’s superboss. In addition, this is also the only battle where Luigi replaces Mario’s partner to fight alongside him. Upon starting the battle, Luigi appears and states that he wishes to prove himself worthy to his brother in order to embark on his own adventure in the Waffle Kingdom. This is a reference to Luigi’s quest to save Princess Eclair in the sequel, Paper Mario: The Thousand-Year Door. If you encounter Luigi in the sequel, the player can learn about his adventures from a collection of books called The Super Luigi series. Luigi’s attack options all fall into the two categories of “Tattle” and “Jump”.
Luigi’s presence increases Mario’s Star Power by 1, adding an eighth Star Spirit to Mario’s Star Power bar. This black Star Spirit, named Bowie, gifts Mario with a hidden Special Move called Whacka Breaker. When used, several Whacka Bumps rain down on opponents, causing 25 points of damage each. The move costs all eight SP to use and is essential to defeating Whacka. Upon defeat, Whacka only offers one Star Point but drops one final item, a Whacka Tumor. This is the best health item in the game, restoring 100 HP and 100 FP.