The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• 7: Thousand Wars images��‎ (30 members)
• AM-ians‏‎ (5 members)
• Administrator templates‏‎ (2 members)
• Advanced PET Battle Chip images‏‎ (305 members)
• Advertisements‏‎ (43 members)
• Air Man Images‏‎ (3 members)
• Air Man type design‏‎ (18 members)
• Air Pirates‏‎ (9 members)
• Air weapons‏‎ (18 members)
• Aliens‏‎ (40 members)
• Allusions‏‎ (2 members)
• American exclusive media‏‎ (18 members)
• Amphibian design‏‎ (13 members)
• Animals‏‎ (6 members)
• Animation studios‏‎ (3 members)
• Anime‏‎ (13 members)
• Antagonists‏‎ (395 members)
• Antihero‏‎ (20 members)
• Aqua and Ice bosses‏‎ (40 members)
• Aquatic enemies‏‎ (90 members)
• Arachnomorpha design‏‎ (22 members)
• Arcade games‏‎ (12 members)
• Archie Comics Classic characters‏‎ (96 members)
• Archie Comics Exclusive characters‏‎ (17 members)
• Archie Comics X characters‏‎ (90 members)
• Archie Comics characters‏‎ (47 members)
• Archie Comics covers‏‎ (239 members)
• Archie Comics crossover characters and worlds‏‎ (22 members)
• Archie Comics images‏‎ (436 members)
• Archie Comics issues‏‎ (87 members)
• Archie Comics items‏‎ (3 members)
• Archie Comics locations‏‎ (5 members)
• Archie Comics staff‏‎ (10 members)
• Armor-piercing attack‏‎ (4 members)
• Army Men Strike images‏‎ (9 members)
• Article management templates‏‎ (15 members)
• Articles in need of citation‏‎ (31 members)
• Articles in need of citations‏‎ (36 members)
• Articles in need of cleanup‏‎ (136 members)
• Articles in need of expansion‏‎ (431 members)
• Articles in need of images‏‎ (6 members)
• Articles with hAudio microformats‏‎ (485 members)
• Artists‏‎ (48 members)
• Asahi Soft Drinks images‏‎ (2 members)
• Asteroid Navi‏‎ (17 members)
• Asteroid Navi Operators‏‎ (15 members)
• Atomic Fire‏‎ (317 members)
• Audio files‏‎ (3 members)
• Axl's Special Weapons‏‎ (21 members)
• B-Side Label images‏‎ (38 members)