- 4-Starred Ladybug of Doom
- 8-Claws Scorpion
- A/D Changer
- Abaki
- Absurd Stealer
- Achacha Archer
- Achacha Chanbara
- Acorno
- Advanced Crystal Beast Amber Mammoth
- Advanced Crystal Beast Amethyst Cat
- Advanced Crystal Beast Cobalt Eagle
- Advanced Crystal Beast Emerald Turtle
- Advanced Crystal Beast Ruby Carbuncle
- Advanced Crystal Beast Sapphire Pegasus
- Advanced Crystal Beast Topaz Tiger
- Agent of Hatred
- Air Armor Ninja
- Air Fortress Ziggurat
- Airknight Parshath
- Alchemy Beast - Aretos the Tin
- Alchemy Beast - Ekenas the Mercury
- Alchemy Beast - Leon the Lead
- Alchemy Beast - Moonface the Silver
- Alchemy Beast - Ouroboros the Bronze