The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2018 interviews (1 member)
- 2018 news (9 members)
- 2019 news (8 members)
- 2020 news (11 members)
- 2021 news (6 members)
- 2022 news (1 member)
- Abilities (6 members)
- Ability images (1 member)
- Accessory images (1 member)
- Administrative templates (2 members)
- Affiliate images (3 members)
- Album cover images (27 members)
- All news (151 members)
- Ansem's Study forums (12 members)
- April 2012 interviews (1 member)
- April 2018 news (6 members)
- April 2019 news (3 members)
- April 2020 news (1 member)
- April 2022 news (5 members)
- April Fools' Day pranks (3 members)
- Archives (1 member)
- Armor images (1 member)
- Arrowgun images (1 member)
- Articles for recently-released titles (0 members)
- Articles in need of images (1 member)
- Articles marked for deletion (0 members)
- Articles needing images (0 members)
- Articles needing improvement (0 members)
- Articles needing references (1 member)
- Articles needing verified sources (2 members)
- Articles requesting expansion (2 members)
- Articles with grammar errors (0 members)
- Artwork images (6 members)
- Attack Card images (1 member)
- Attractions (1 member)
- Audience Chamber forums (3 members)
- Audio files (1 member)
- August 2018 news (2 members)
- August 2019 news (1 member)
- August 2020 news (1 member)
- August 2022 news (1 member)
- Book cover images (1 member)
- Bring Arts figure images (1 member)
- Bring Arts figures images (7 members)
- Button images (68 members)
- Category:Kingdom Hearts Dark Road ability images (11 members)
- Category:Kingdom Hearts III Keyblade images (1 member)
- Category:Kingdom Hearts II images (2 members)
- Category:Kingdom Hearts Union x special attack images (36 members)
- Category:Kingdom Hearts Union χ medal images (7 members)