The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2018 (1 member)
- 2019 (3 members)
- 2020 (4 members)
- 2020s (1 member)
- 2021 (2 members)
- 2022 (8 members)
- 2023 (6 members)
- 2024 (8 members)
- 2D platformers (18 members)
- 3D platformers (15 members)
- Adventures of Sonic the Hedgehog (1 member)
- Adventures of Sonic the Hedgehog episodes (1 member)
- Advisory rating organizations (1 member)
- Aircraft (2 members)
- Aliens (1 member)
- All namespace redirect templates (3 members)
- Alternate versions and ports (8 members)
- Amy Rose (3 members)
- Ancients (2 members)
- Animation templates (2 members)
- Anthropomorphic animals (1 member)
- Antiheroes (10 members)
- Arcade games (4 members)
- Archie (1 member)
- Archie Comics staff (2 members)
- Articles in need of attention (1 member)
- Articles in need of expanding (35 members)
- Articles in need of references (2 members)
- Articles with claims that need better sources (1 member)
- Articles with hatnote templates targeting a nonexistent page (5 members)
- Articles with unsourced claims (27 members)
- Artificial intelligences (2 members)
- Attacks and moves (5 members)
- Babylon Rogues (4 members)
- Babylonians (3 members)
- Badniks (1 member)
- Banner templates (8 members)
- Bats (1 member)
- Birds (2 members)
- Black Arms (1 member)
- Books (1 member)
- Bounty hunters (4 members)
- Button Templates (76 members)
- Category namespace templates (1 member)
- Cats (3 members)
- Chameleons (1 member)
- Chaotix (2 members)
- Character-substitution templates (12 members)
- Character templates (9 members)
- Citation templates (11 members)