The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Alternate egos (1 member)
- Animals (1 member)
- Antagonists (11 members)
- Article management templates (1 member)
- Article stubs (0 members)
- Blog posts (3 members)
- Browse (10 members)
- Candidates for deletion (0 members)
- Characters (43 members)
- Cute People (1 member)
- Dino Girl Gauko (7 members)
- Disambiguations (0 members)
- Episodes (22 members)
- Females (19 members)
- Gauko and Friends (34 members)
- Help (0 members)
- Humans (2 members)
- Images (8 members)
- Images by Character (3 members)
- Images of Bibilian (1 member)
- Images of Gauko (2 members)
- Images of Naoko Watanabe (2 members)
- Jerks (1 member)
- License Images (2 members)
- Locations (3 members)
- Males (19 members)
- Naoko’s Friends (1 member)
- Non human (1 member)
- Old people (1 member)
- Protagonists (2 members)
- Robots (3 members)
- Seasons and series (1 member)
- Template documentation (32 members)
- Templates (41 members)
- Templates/Context-link (6 members)
- Templates/Infobox (8 members)
- Templates/Navbox (1 member)
- Templates/Notice (1 member)
- Templates/Quote (2 members)
- Trivia (1 member)