The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Air Elementals (BZPRPG III) (7 members)
- Air Elementals (NBZP) (1 member)
- Air Elementals (Six Kingdoms) (1 member)
- Air Elementals (The Academy) (1 member)
- Air Elementals (The Gate) (1 member)
- Ak'rei'an (10 members)
- Akiri (9 members)
- Alignment (9 members)
- Alive (2 members)
- Alive (BZPRPG III) (34 members)
- Alive (Bara Magna (Series)) (17 members)
- Ancora (1 member)
- Annual Competitions (Bara Magna (Series)) (1 member)
- Anxilia (1 member)
- Approved (1 member)
- Approved (BZPRPG III) (2 members)
- Approved Species (BZPRPG III) (0 members)
- Archaic (BZPRPG III) (1 member)
- Archaic Tech (1 member)
- Archaic Tech (BZPRPG III) (3 members)
- Article stubs (38 members)
- Artificial Intelligence (BZPRPG) (5 members)
- Ash Tribe (2 members)
- Assassin (2 members)
- Assassinations (1 member)
- Assassinations (BZPRPG III) (3 members)
- Assassins (1 member)
- Athlete (2 members)
- Avian (2 members)
- Axonn's Species (Bionicle Kingdoms IV) (1 member)
- B.A.T. Hybrid (The Gate) (1 member)
- BZPRPG (4 members)
- BZPRPG I (71 members)
- BZPRPG III (24 members)
- BZPRPG III Arc I (1 member)
- BZPRPG III Arc II (1 member)
- BZPRPG III Arc III (1 member)
- BZPower (2 members)
- Ba-Skakdi (3 members)
- 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)