- Kelbek
- Keldo
- Key Mace
- Kid Junk
- Killer Needle
- Kinetic Soldier
- King Dragun
- King of Yamimakai
- King's Knight
- Kiseitai
- Kishido Spirit
- Kiteroid
- Knight of Dark Dragon
- Knight of Landstar
- Knight of Pentacles
- Knight's Title
- Koala March
- Kojikocy
- Koumori Dragon
- Kozaky
- Krebons
- Krokodilus
- Kunai with Chain
- Kung Fu Nyan Nyan