The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Collapse templates (4 members)
- Comic templates (4 members)
- Comics (1 member)
- Compilations (3 members)
- Context-link templates (7 members)
- Continuities (7 members)
- Continuity banners (3 members)
- Conversion templates (1 member)
- Convert by module documentation (1 member)
- Convert errors (0 members)
- Courtesy templates (1 member)
- Crocodiles (1 member)
- Cross-reference templates (3 members)
- Crossover characters (1 member)
- Crossover games (6 members)
- DVDs (1 member)
- Deceased staff members (1 member)
- Defunct companies (1 member)
- Dimensions (1 member)
- Disambiguation and redirection hatnote templates (1 member)
- Disambiguations (1 member)
- Discontinued games (1 member)
- Doctor Eggman (4 members)
- Documentation assistance templates (5 members)
- Documentation header templates (5 members)
- Documentation see also templates (4 members)
- Documentation shared content templates (2 members)
- Doom Powers (1 member)
- Downloadable content (1 member)
- Dr. Robotnik's Mean Bean Machine (1 member)
- Dreamcast games (1 member)
- E-100 Series (1 member)
- Echidnas (1 member)
- Egg Mobiles (1 member)
- Eggman's bases (3 members)
- Eggman's creations (2 members)
- Eggman's creations (IDW) (1 member)
- Eggman Empire (1 member)
- Emeralds (2 members)
- Error-message templates (1 member)
- Example-formatting templates (7 members)
- Exclude in print (1 member)
- Family of Doctor Eggman (2 members)
- Featured Article (35 members)
- Females (7 members)
- Fighting games (2 members)
- Final stages (1 member)
- Fishing Spot items (1 member)
- Flag templates (3 members)
- Fly types (3 members)