List of Multiplayer Versus unlockables

This is a list of costumes in Super Mario Maker 2 unlocked through Multiplayer Versus, and how to obtain them. The names of the costumes come from the American version of the game.

Luigi Outfit and Luigi Hat
Attain Rank C, or 1000 points.

Doctor Outfit and Doctor Hat
Attain Rank B, or 2000 points.

Laughing Shirt
Attain Rank A, or 3000 points.

Nintendo Uniform
Attain Rank S, or 4000 points.

Superb Suit
Attain Rank S+, or 5000 points.

Shorts of Doom!
Win a match.

Bowser Headpiece and Bowser Suit
Win two consecutive matches.

Fireworks Shirt
Win five consecutive matches.

Mushroom Hairclip
Win ten consecutive matches.

Trivia
It was rumored that an S++ rank existed, which would've been attained, along with a costume, with a rating of 8000 points. However, the version 1.1 update to Super Mario Maker 2 changed the rating system so that the next and final "rank" would be attained upon reaching 6000 points, which makes the the rank turn pink. There is no costume at this level.