Diddy Kong is compatible with the following mods:

Palutena's Guidance
Pokemon Stadium
Hikaru
Mt. Dedede
Battle Arena
Soulbound Conflict
Po & Gumbo
Rivals RC
Miiverse
Unregistered Hypercam2
Yooka and Laylee
Snake Interregation
Chao
Greenwood Town
Henry Stickmin
Green Flower Zone
The Trial Grounds
Steve
Mario Cap
BBC News
Outskirts Invasion
Adventure Mode
Naruto
Boris Anderson
Amber
ScreenKO
Neutralising Gas
Nintendo Wii Remote
The Chosen One