The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2021 games (7 members)
- 2022 games (2 members)
- 2023 games (6 members)
- 2024 games (6 members)
- 2025 games (2 members)
- 2D Mario games (1 member)
- 2D Platforming games (6 members)
- 2D platforming games (9 members)
- 2 vs. 2 minigames (72 members)
- 3D Mario games (7 members)
- 3D Platforming games (9 members)
- 4-player minigames (233 members)
- 8-player minigames (11 members)
- ???? (1 member)
- Abilities in Paper Mario: Sticker Star (4 members)
- Accessories (18 members)
- Acorn Plains Levels (16 members)
- Activities on Play Nintendo (1 member)
- Actors (25 members)
- Admin blog posts (1 member)
- Administration of this site (13 members)
- Adopted (7 members)
- Ailments (4 members)
- Air creatures (3 members)
- Aircraft (11 members)
- Airships (29 members)
- Album covers (1 member)
- Albums (1 member)
- Aliases (3 members)
- Aliens (63 members)
- Alive (1 member)
- Alive characters (295 members)
- Allies (349 members)
- Allies in Bowser Jr.'s Journey (1 member)
- Allies in Minion Quest: The Search for Bowser (2 members)
- Alter-egos (24 members)
- Alternate forms (25 members)
- American people (19 members)
- Amphibians (11 members)
- Amps (4 members)
- Amusement-themed (27 members)
- Amusement parks (4 members)
- Ancient ruins-themed (21 members)
- Animal Buddies (7 members)
- Animal Crossing series (2 members)
- Animal Friends (1 member)
- Animals (85 members)
- Animate objects (110 members)
- Anime (4 members)
- Announcement Blog Posts (1 member)