edit: Corrected the post back to what actually works:
Use these two game genie codes:
AZUZIGPA
ONEPNPZE
Now US version of "The Legend of Kage" becomes an Input Lag tester. It copies your joypad into PPUMASK every frame. Hold A to toggle the monochrome bit.
Use these two game genie codes:
AZUZIGPA
ONEPNPZE
Now US version of "The Legend of Kage" becomes an Input Lag tester. It copies your joypad into PPUMASK every frame. Hold A to toggle the monochrome bit.