Normally one to sit back and watch fights between a vertically challenged man and various national stereotypes, Referee Mario has decided that it's time to experience the thrills of being a boxer from the perspective of a boxer; unfortunately, Referee Mario doesn't seem to have adopted the principles of a clean fight, as he is entirely devoid of hurtboxes on any of his animations and thus effectively untouchable.
Referee Mario is for all intents and purposes a two-button character that only has a single standing attack assigned to both its (X) and (Y) buttons, but is technically a six-button character due to the (Z) and buttons serving only to fill the character's Power meter, though making an effort to gain Power is unnecessary owing to neither of the character's two attacks requiring Power to activate. Referee Mario's movement velocities are identical to those of Kung Fu Man's, which in conjunction with other factors give strong credence to the character using KFM as a base; one of the features still left over from Kung Fu Man is his air jump, which serves no purpose on Referee Mario due to the latter having no aerial attacks, and while it can be argued that the air jump could be used for evasive purposes, this is rendered moot by the character's most notable feature, in which it has no hurtboxes on any of its animations and is thus invulnerable to any conventional means of being attacked.
Both of the character's attacks are similar in function, having long startup times before sending out a hitbox that covers almost the entire width of the screen, with the difference between the two being that the (X) attack consists of three hitboxes that gradually grow bigger in size as the attack goes on, while the (Y) attack is a singular large hitbox that can a standard character should it make contact with them. Both of the attacks have inherent major flaws that make them quite easy to deal with, as they are both highly telegraphed by a speech bubble appearing by Referee Mario for the entire startup duration, allowing ample time to prepare for them, though these speech bubbles will be obscured if the character is right up close to the screen boundary behind them; furthermore, both attacks do no shield damage, making it easy for an opponent to avoid the attack by just standing there and waiting to block it.
Referee Mario uses M.U.G.E.N's default A.I. due to a dedicated custom A.I. not being programmed into him, though this becomes irrelevant when the character's inherent invincibility is added to the equation, as fights will only end when the opponent stops trying to block either of Referee Mario's two easily telegraphed attacks.
This character does not have any Special or Hyper Attacks.