The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Ba-Toa (10 members)
- Bad Company (5 members)
- Bara Magna (Series) (9 members)
- Battlemasters (2 members)
- Battles (7 members)
- Battles (BZPRPG) (1 member)
- Bionicle Kingdoms (2 members)
- Blacksmith (4 members)
- Bo-Lesterin (3 members)
- Bo-Toa (12 members)
- Bone Hunters (3 members)
- Browse (1 member)
- Buildings (1 member)
- Candidates for deletion (19 members)
- Canon (57 members)
- Canon Species (1 member)
- Carpenter (1 member)
- Carrex (AMG) (1 member)
- Carvers (2 members)
- Chaotic Evil (5 members)