King of the Beasts
King of the Feral Imps
King of the Skull Servants
King of the Swamp
King of Yamimakai
King Pyron
King Scarlet
King Tiger Wanghu
King's Consonance
King's Knight
King's Resonance
King's Sarcophagus
King's Synchro
Kingyo Sukui
Kinka-byo
Kiryu
Kiseitai
Kishido Spirit
Kitchen Dragonmaid
Kitsuni Kitsunebi
Kittytail, Mystical Beast of the Forest
Kiwi Magician Girl
Knight Armed Dragon, the Armored Knight Dragon
Knight Day Grepher
Knight of Armor Dragon
Knight of Legend
Knight of the Red Lotus
Knight's Title
Knightmare Cerberus
Knightmare Corruptor Iblee
Knightmare Goblin
Knightmare Gryphon
Knightmare Incarnation Idlee
Knightmare Mermaid
Knightmare Phoenix
Knightmare Unicorn
Koa'ki Meiru Beetle
Koa'ki Meiru Bergzak
Koa'ki Meiru Boulder
Koa'ki Meiru Crusader
Koa'ki Meiru Doom
Koa'ki Meiru Drago
Koa'ki Meiru Ghoulungulate
Koa'ki Meiru Gravirose
Koa'ki Meiru Guardian
Koa'ki Meiru Hydro Barrier
Koa'ki Meiru Ice
Koa'ki Meiru Initialize!
Koa'ki Meiru Maximus
Koa'ki Meiru Overload
Koa'ki Meiru Powerhand
Koa'ki Meiru Prototype
Koa'ki Meiru Rooklord
Koa'ki Meiru Sandman
Koa'ki Meiru Sea Panther
Koa'ki Meiru Shield
Koa'ki Meiru Speeder
Koa'ki Meiru Supplier
Koa'ki Meiru Token
Koa'ki Meiru Tornado