The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Murders (BZPRPG III) (1 member)
- Musicians (13 members)
- Mutan Matoran (BZPRPG) (1 member)
- Mutant Toa/Kikanalo Fusion (The Gate) (1 member)
- Mutant Toa (AMG) (1 member)
- Mutated Toa (AMG) (1 member)
- Mutation/Fusion (BZPRPG) (1 member)
- N/A Elementals (BZPRPG I) (1 member)
- N/A Elementals (ToS) (1 member)
- NA Elementals (AMG) (2 members)
- NA Elementals (A Midnight Grey) (1 member)
- NBZP (22 members)
- NEX (4 members)
- NPC (6 members)
- NPCs (2 members)
- Native Tech (BZPRPG III) (1 member)
- Navigation Templates (0 members)
- Neutral (3 members)
- Neutral Evil (1 member)
- Neutral Good (7 members)