- Crane Crane
- Crashbug
- Crashbug X
- Crashbug Y
- Crashbug Z
- Crass Clown
- Crawling Dragon
- Creation Resonator
- Crimson Blader
- Crystal Beast Amber Mammoth
- Crystal Beast Amethyst Cat
- Crystal Beast Cobalt Eagle
- Crystal Beast Emerald Turtle
- Crystal Beast Ruby Carbuncle
- Crystal Beast Sapphire Pegasus
- Crystal Beast Topaz Tiger
- Crystal Skull
- Curry Fiend Roo
- Curse of Dragon
- Curtain of the Dark Ones
- CXyz Battleship Cherry Blossom
- Cxyz Coach Lord Ultimatrainer
- CXyz Comics Hero Legend Arthur
- CXyz Dark Fairy Cheer Girl