Kodewerx

Well, no one's started a thread for this game yet, so I might as well.

The easiest and most useful cheat would be
Infinite / Max Gold (possible options include setting gold to max, shops do not cost gold, max gold after battle victory, etc)

Other useful cheats:
Instant win battles (press R)
Instant win minigames (press R)
Max 'exp' in minigames (i.e. max level when training) (press R)

Less useful:
All levels unlocked
All dungeons unlocked
All awards
'Slow down' falling tiles (not sure if this one's possible)
Infinite time in minigames
Always drop 3xcolor X (not sure if this is possible)