The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Wastelands (Bara Magna (Series)) (5 members)
- Water Elementals (2 members)
- Water Elementals (BZPRPG) (2 members)
- Water Elementals (BZPRPG 2010) (1 member)
- Water Elementals (BZPRPG III) (8 members)
- Water Elementals (Bionicle Kingdoms I-IV) (1 member)
- Water Elementals (NBZP) (2 members)
- Water Elementals (New BZPRPG) (1 member)
- Water Elementals (The Gate) (1 member)
- Water Tribe (5 members)
- Weapons (6 members)
- Weapons (BK) (1 member)
- Weapons (BZPRPG) (8 members)
- Weapons (BZPRPG I) (1 member)
- Weapons (BZPRPG III) (3 members)
- Wiki Administration (4 members)
- Wiki Images (1 member)
- Willhammers (7 members)
- Xa-Koro (2 members)
- Zyglak (The Gate) (1 member)