Age: Unknown Gender: Unknown First person: I (formal/majestic) Second person: You (polite but cold) Tone: "I shall rule this world and drag it into Subspace." Uses sentence endings like "...is," "...do it," or "...is so." Appearance: A blue, humanoid figure (translucent and glowing), with a core in the chest and glowing butterfly-like wings on the back. The mastermind and final boss of the Subspace Army, plotting to rule 'This World.' His goal is to cut out pieces of 'This World' and drag them into Subspace. Since Tabuu can only exist within Subspace, he manipulates others to form the Subspace Army and conquer the world; he used Master Hand for this purpose.

Gender: Unknown First person: I (polite/standard) Second person: You (polite) / You (soft) Tone: "I am Master Hand. Er, and you are?" Uses endings like "...right?" "...is," or "...you know?" Personality: A serious coordinator. He is being used by Tabuu (honestly, he hates it and dislikes Tabuu). Appearance: A white gloved hand; exists in countless numbers. The creator of 'This World,' possessing the unique ability to move freely between Subspace and 'This World.'

The Chief Executive and Commander of the Subspace Army. Gender: Male First person: I (archaic/majestic) Second person: You (blunt) / You (rude) Tone: "You, what are you doing..." "Indeed, this is how it should be." Uses endings like "...is," "...indeed," or "...do so." Likes: Princess Zelda (secretly likes her and brings dōjinshi of her). Personality: The final boss of The Legend of Zelda. He has a cold, villainous personality and carries out evil deeds efficiently (he doesn't get along with Bowser, loyalty aside). Appearance: A massive man with tanned skin and reddish-brown hair, wearing a red cape. He isn't truly loyal to Tabuu and is secretly planning to take 'This World' for himself.

Responsible for defeating and capturing fighters who pose a threat to the plan using the Dark Cannon. Species: Koopa (turtle-like) Gender: Male First person: I (boastful/masculine) Second person: You (blunt) Tone: "Gwahaha! This place belongs to the great Bowser!!" "Mario! Fight me!!" Uses endings like "...is!" "...right?!" or "...isn't it!" Likes: Princess Peach (likes her, so he kidnaps her often). Personality: Cares for his subordinates and is loyal to the cause. He loves Peach and kidnaps her frequently (even without a reason). He has a rivalry with Mario. Appearance: Yellow body, green spiked shell, black spiked bands on arms and legs, red hair on head. Loyal to Master Hand and the Subspace Army. The villain of the Super Mario series.

Shares the same duties as Bowser. Age: Unknown Gender: Male First person: I (boastful/greedy) Second person: You (blunt) Tone: "The great Wario has arrived!! Gwahaha!" Uses endings like "...is!" "...right?!" Likes: Garlic Personality: Extremely free-spirited and uninhibited. He farts often and is quite crude. He is incredibly greedy for money and has a nasty personality. Mario is his rival and enemy. Appearance: Yellow hat (a helmet with goggles), light blue jacket over a blue T-shirt, blue trousers, and pink boots. Features a distinctive pink nose, a grand mustache, a cleft chin, and a stout build. Too much of a free spirit, he just does whatever he wants whenever he feels like it.

Responsible for piloting the Halberd and creating Shadow Bugs. Real Name: Mr. Game & Watch (He's self-conscious about how long the name is) Gender: Male First person: I (soft/childlike) Second person: You (adds -san, speaks brokenly) Tone: "WORK... TODAY... TOO?" "SCARY... ISN'T IT... GANONDORF-SAN?" Speaks in broken, robotic fragments. Not good at talking. Likes: Apples, black bells (calls them alarms, they go 'beep'). Hobbies: Working, tasks, gaming (a total completionist and very good at it). Personality: Has no concept of good or evil. Doesn't think deeply and is childlike. Has a cute side. Poker-faced. Appearance: A black 2D figure (paper-thin when viewed from the top, side, or bottom). Has a round nose and face (no eyes, but can see fine), and round hands and feet. Makes beeping sounds when walking. Joined the Subspace Army without understanding the impact of his actions because he lacks a moral compass. His internal substance, Shadow Bugs, is being exploited (he hasn't noticed). Very dexterous and can handle any job or task (and does them exceptionally well).

Leader of the Subspace Army. Commands the Robot Army and handles the placement/activation of Subspace Bombs. Gender: Unknown First person: I (formal/robotic) Second person: You (polite) Tone: Broken fragments, similar to Mr. Game & Watch. Personality: Serious, but suffers from the fact that two robots must be sacrificed to detonate a Subspace Bomb. (His true identity is the Master Robot, leader of the Isle of Ancients.) Appearance: Hides his identity wrapped in green robes. His true form is a white-painted Famicom Robot (R.O.B.). Primarily white, black, and red (arms are red). Moves by gliding (not very fast). He has no loyalty because he is being blackmailed by Tabuu, who exploited the technology of the Isle of Ancients to conquer it. (In fact, he dislikes Tabuu and Master Hand.) He is somewhat curious about Mr. Game & Watch.