- Loki, Lord of the Aesir
- Lord of D.
- Lord of the Red
- Lord of Zemia
- Lord Poison
- Lure Phantom
- Luster Dragon
- Lycanthrope
- M-Warrior #1
- Mach Synchron
- Machina Sniper
- Machine King
- Mad Archfiend
- Mad Profiler
- Mad Sword Beast
- Magical Scientist
- Magician of Black Chaos
- Magician's Valkyria
- Magnet Warrior Σ+
- Magnet Warrior Σ-
- Magnet Warrior Ω-
- Maha Vailo
- Maiden in Love
- Maiden of the Aqua