- Archeonys
- Archfiend General
- Archfiend Interceptor
- Archfiend Soldier
- Archlord Zerato
- Arduous Decision
- Aria From Beyond
- Aria the Melodious Diva
- Armaill
- Armed Changer
- Armed Dragon LV10
- Armed Dragon LV3
- Armed Dragon LV5
- Armed Dragon LV7
- Armed Ninja
- Armed Protector Dragon
- Armed Samurai - Ben Kei
- Armor Breaker
- Armor Ninjitsu Art of Alchemy
- Armor Ninjitsu Art of Freezing
- Armor Ninjitsu Art of Revival
- Armor Ninjitsu Art of Rust Mist
- Armor Ninjitsu Art of Teleportation
- Armored Back