The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
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- Blog posts (30 members)
- Books (5 members)
- Browse (6 members)
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- Cast (88 members)
- Category templates (3 members)
- Characters (35 members)
- Community (6 members)
- Content (8 members)
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- Dec (1 member)
- Deceased (10 members)
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- Files (2 members)
- Filmography (11 members)
- Forums (6 members)
- Galleries (7 members)
- General wiki templates (31 members)
- Green Martians (12 members)
- Heliumites (4 members)
- Help (5 members)
- Help desk (2 members)
- Hidden categories (2 members)
- Human (8 members)
- Image wiki templates (10 members)
- Images (13 members)
- Infobox templates (9 members)
- Infoboxes (2 members)
- Kingdoms (6 members)
- LESBIAN (1 member)
- Media (5 members)
- Merchandise (6 members)
- Music (0 members)
- New pages (0 members)
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- Organization (9 members)
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- Planets (2 members)
- Policy (2 members)
- Production (10 members)
- Races (7 members)
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