The following are known Action Replay Codes for ClayFighter on SEGA Genesis / Mega Drive (Genesis).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay

• Character Modifier P1
  FF8E4A:XX
• Character Modifier P2
  FF8E0B:XX
• CPU/P2’s Number of Rounds Won Modifier
  FF19A9:XX
• Fake Infinite Health P1
  FF41C3:45
• Infinite Time
  FF56FA:1D
• Stage Modifier
  FF08B0:XX

Chacter Modifiers

• 00 – Bad Mr. Frosty
  01 – Taffy
  02 – Tiny
  03 – The Blob
  04 – Blue Suede Goo
  05 – Ickybod Clay
  06 – Helga
  07 – Bonker

Stage Modifiers

• 00 – Helga’s Stage
  01 – Ickybod Clay’s Stage
  02 – Taffy’s Stage
  03 – Bonker’s Stage
  04 – Tiny’s Stage
  05 – Blue Suede Goo’s Stage
  06 – Taffy’s Stage
  07 – Bad Mr. Frosty’s Stage
  08 – The Blob’s Stage

  There are more digits in the level select, but they are the same stages above repeated.