SMM EventCourseThumb Walkin with Undodog
Undodog will help you correct a minor mistake by cancelling your last action. You will quickly find that this hound is a great friend.
~ Mario Paint US Instruction Manual, page 6


Undo Dog made his first appearance in Mario Paint, where he would, as his name suggests, help the player undo their last action once his icon is clicked. He reappeared in Super Mario Maker, where he could delete the entire level, and eventually became an alternate costume for Mario.

Powers and Stats

Tier: At least 9-C. Unknown via his rocket

Name: Undo Dog, referred to as Undodog in Mario Paint, or Undo in the PAL region version of Super Mario Maker

Origin: Super Mario Maker, Mario Paint

Gender: Presumably male

Age: Unknown

Classification: Dog

Powers and Abilities: Peak Human Physical Characteristics, Superhuman Speed, Existence deletion (Can undo the last thing the player has done, which even works on sentient beings, sound effects, etc), Hammerspace (Can pull a rocket out of nowhere, which it uses for flight), Flight

Attack Potency: At least Street level physically (Can easily break through blocks made out of brick). Unknown with his rocket (His rocket can erase all objects in an entire level just from impact)

Speed: Supersonic+ (Can outrun Bullet Bills)

Lifting Strength: Unknown

Striking Strength: At least Street Class

Durability: Unknown

Stamina: High

Range: Standard melee range. Hundreds of meters via existence deletion.

Standard Equipment: A rocket that it uses for flight

Intelligence: Unknown

Weaknesses: In Mario Paint, the dog would sometimes sneeze loudly if the music is turned off and left silent, the game manual states that this is because of his allergies


Notable Victories:

Notable Losses:

Inconclusive Matches: