The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- A (33 members)
- A to Z (26 members)
- Adults (93 members)
- Aliens (15 members)
- Animals (13 members)
- Antagonists (16 members)
- Appearance templates (8 members)
- Article management templates (0 members)
- Article stubs (239 members)
- Artwork (2 members)
- B (33 members)
- Bands (6 members)
- Behind the Scenes (3 members)
- Block Family (2 members)
- Blog posts (843 members)
- Books (2 members)
- Browse (31 members)
- C (35 members)
- Candidates for deletion (0 members)
- Candidates for renaming (178 members)
- Candidates for speedy deletion (0 members)
- Cast (60 members)
- Category talk pages (7 members)
- Character galleries (113 members)
- Character histories (7 members)
- Characters (186 members)
- Characters with EHML (7 members)
- Citation templates (6 members)
- Community (11 members)
- Community templates (24 members)
- Creators (2 members)
- Crew (5 members)
- Crossovers (9 members)
- Currently unnamed episodes/songs (0 members)
- D (46 members)
- Deceased Voice Actors (2 members)
- Deceased characters (9 members)
- Decker family (2 members)
- Directors (3 members)
- Disambiguations (3 members)
- Divorced (4 members)
- Dogs (4 members)
- Dr. Zone (12 members)
- E (13 members)
- Episode galleries (77 members)
- Episode screenshots (5 members)
- Episodes (82 members)
- Event Galleries (10 members)
- Events (25 members)
- External link templates (3 members)