Underchomp

The Underchomp is a red, yellow, and blue three-headed Chain Chomp, that acts as a guard dog of The Underwhere in Super Paper Mario. It is located in Underwhere Road. Beating the Underchomp is Dorguy the Third's test.

Mario, Luigi and Bowser face against this beast in a far different way from other enemies in the game; they fight the creature in a turn-based battle, though not in the same fashion as other Paper Mario games.

Each head has a special ability. The Red Underchomp can breathe crimson fire, the Blue Underchomp can breathe blue fire, and the Yellow Underchomp has stinky breath. Underchomp can also charge up for one turn and attack stronger later.

Using Bowser and Thudley to attack the Underchomp is the most effective way to defeat the massive enemy. If the heroes found Piccolo the Pixl, then it will make the battle that much easier. By using Piccolo's power, the heroes can make the Underchomp fall asleep for several turns. Boomer is a great choice for damaging and defeating the Underchomp. Putting the Underchomp to sleep and using Luigi to attack it can also defeat the Underchomp, with each head taking 2 Spring Jumps to defeat. The Underchomp will wake up after the Spring Jumps have been performed but will not attack, allowing Piccolo to be used to attack the next head. They are possible to defeat in one turn by using a Shooting Star.

Options
(* = when playing as Mario; ** = when playing as Bowser; *** = when playing as Luigi)
 * Attack: Jump on a head for some damage.
 * Technique
 * Flip*: Flip between dimensions. This move is useless.
 * Flame**: Heat up the iron of the Underchomp.
 * Super jump***: Damage one head by jumping against it from beneath.
 * Pixl
 * Thoreau: Try to lift the Underchomp. The move will fail because the Underchomp is to heavy.
 * Boomer: Hit the Underchomp with an explosion.
 * Slim: Evade attacks.
 * Thudley: Ground pound on a head.
 * Carrie: Lift the player up. This move is useless.
 * Fleep: Make the Underchomp dizzy.
 * Cudge: Whack the Underchomp to cause damage.
 * Dottie: Shrink the player to evade attacks.
 * Barry: Attack the Underchomp with a barrier.
 * Dashell: Dash quickly. This move is useless.
 * Piccolo: Put the Underchomp to sleep.
 * Item
 * Switch
 * Mario** ***
 * Bowser* ***
 * Luigi* **
 * Escape: Run away. The Underchomp will notice this, however, and the battle will continue.
 * Escape: Run away. The Underchomp will notice this, however, and the battle will continue.

Trivia
🇵🇲
 * The Underchomp is based upon the legendary hellhound Cerberus, a giant, three-headed dog who guarded the gates of Hades in Greek mythology. He shares the same weakness: music.
 * During the battle Mario, Luigi and Bowser can use their special abilities. When Mario uses flip, he dodges the attacks, when Luigi uses super jump he does a more powerful jump and when Bowser uses fire it simply heats up the metal Chomps, wasting a turn.
 * This battle is a parody of general, turn-based RPGs, specifically the EarthBound games, that looked and functioned just like the Underchomp battle.
 * The battle music for Underchomp is an 8-bit remix of the mini-boss theme.
 * When the player is at low level while battling the Underchomp and uses Barry (whose attack power is only half of the hero's actual attack power), the attack might be ineffective. However, the screen will say: "Nice hit! Underchomp takes 0 damage!"
 * When switching characters, each character will say something else. When switching to Mario, Tippi will say: "Go, Mario!", Bowser will say: "Stomping time!" and Luigi will say: "I'm on the job!"