The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2013 (8 members)
- 2014 (487 members)
- 2015 (308 members)
- 2016 (414 members)
- 2017 (11 members)
- 2018 (3 members)
- 2019 (4 members)
- 2020 (5 members)
- Abilities (12 members)
- Administrators (8 members)
- Adults (44 members)
- Affectionate Mixels (6 members)
- Ages (4 members)
- Aggressive Mixels (17 members)
- Alien Mixels (12 members)
- Alternative Designs (27 members)
- Alternative Names (5 members)
- Amphibian Mixels (3 members)
- Animal-like Mixels (62 members)
- Animation studios (4 members)
- Annoying Characters (5 members)
- Armed Characters (16 members)
- Article management templates (11 members)
- Article stubs (3 members)
- Articles needing improvement (1 member)
- Articulated eyes (15 members)
- Artwork files (477 members)
- Asymmetrical Mixels (50 members)
- Background character galleries (43 members)
- Background characters (136 members)
- Badges (7 members)
- Ball-jointed arms (44 members)
- Ball-jointed eyes (3 members)
- Ball-jointed jaws (18 members)
- Banned from chat (13 members)
- Barrel-like mouth (3 members)
- Bat-like Mixels (4 members)
- Beaked Mixels (3 members)
- Big heads (212 members)
- Big kids (9 members)
- Bioluminescence (4 members)
- Bird-like Mixels (3 members)
- Bladed Mixels (7 members)
- Blocked users (137 members)
- BlogListingPage (0 members)
- Blog posts (2,720 members)
- Blue tribes (5 members)
- Books (6 members)
- Bots (3 members)
- Brown tribes (3 members)