The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Flamethrower (2 members)
- Former Banzai Blasters (1 member)
- Free software projects (1 member)
- Full Credits (9 members)
- Galleries (27 members)
- Games (1 member)
- Ghost Characters (1 member)
- Google software (1 member)
- Great at Crime (2 members)
- HEIST NIGHT (1 member)
- HEIST NIGHT Characters (4 members)
- Help (0 members)
- Images (1 member)
- In-Universe-Media (2 members)
- Indus Tarbella (2 members)
- Inscribed Characters (17 members)
- Island Country (2 members)
- Island Country Locations (1 member)
- Items (8 members)
- Items by Appearances (1 member)
- JavaScript programming language family (1 member)
- Locations (35 members)
- Locations by Appearances (2 members)
- Lorelai Blyndeff (3 members)
- Lorelai Blyndeff Summons (4 members)
- Main Antagonists (3 members)
- Main Characters (8 members)
- Main Page Templates (8 members)
- Maintenance Categories (9 members)
- Male (32 members)
- Mara Salamin (1 member)
- Martin Blyndeff (2 members)
- Meme Files (2 members)
- Mentioned Only Characters (9 members)
- Merch (3 members)
- Molly Blyndeff (2 members)
- Molly Hoodie Commercial (2 members)
- Mundies (16 members)
- Non-Canon Content (27 members)
- OVAs (2 members)
- Object-oriented programming languages (1 member)
- Ocean Country Locations (1 member)
- Opening Themes (2 members)
- Opening themes (2 members)
- Organizations (8 members)
- Pages using Tabber parser tag (11 members)
- Pages using duplicate arguments in template calls (2 members)
- Pages with broken file links (257 members)
- Pages with ignored display titles (4 members)
- Pages with reference errors (5 members)