The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 'Cause You're My Hero. Images (15 members)
- A-Rank Villains (8 members)
- Abegawa Tenchu Kai (5 members)
- Abegawa Tenchu Kai Images (4 members)
- About a voyage Images (13 members)
- Active Discussions (1 member)
- Airjet's Super Move (0 members)
- Airjet's Ultimate Moves (1 member)
- Airjet Images (12 members)
- Akira Iwako Images (12 members)
- Alan Kay Images (1 member)
- Alive (283 members)
- All For One (1 member)
- All For One's Quirks (33 members)
- All For One's Ultimate Moves (2 members)
- All For One Battles (11 members)
- All For One Images (379 members)
- All Might Rising (OVA) Images (17 members)
- All Might Rising Images (6 members)
- Anan Kurose Battles (5 members)
- Anan Kurose Images (77 members)
- Animals (5 members)
- Animated Gif (602 members)
- Anime (29 members)
- Anime Design Images (2 members)
- Anime Original Battles (6 members)
- Anime Original Characters (13 members)
- Anime Original Hero Schools (3 members)
- Anime Original Quirks (9 members)
- Anime Original Subjects (5 members)
- Anime Original Ultimate Moves (3 members)
- Anna Scervino Images (5 members)
- Anonymous Images (27 members)
- Antagonists (26 members)
- Aorio Kuraishisu Images (2 members)
- Appearance templates (46 members)
- Arc navigation templates (35 members)
- Asui Family (5 members)
- Atsuhiro Sako Battles (13 members)
- Atsuhiro Sako Images (223 members)
- Authors (5 members)
- Authors Comment (48 members)
- B-Rank Villains (11 members)
- BD/DVD Covers (38 members)
- Backdraft Images (26 members)
- Bakugo Family (3 members)
- Battle Trial Arc Antagonists (2 members)
- Battle Trial Arc Battles (2 members)
- Battle Trial Arc Chapters (4 members)
- Battle Trial Arc Episodes (3 members)