Here is the full list of all 12 Revenge of the Wounded Dragons trophies - there are 7 bronze, 4 silver and 1 gold.
Collect every golden statue.
Find every secret area.
Kill 6 enemies with the same shotgun.
Get a x20 multiplier.
Collect 32 golden teeth.
Beat the game.
Kill Fat Lu with a shotgun... at point blank.
Use all of the coop moves.
Use all 8 finishing moves in one level.
Feed an enemy to a crocodile.
Knock one rider off his scooter with a bat.
Beat a whole level without picking up weapons or objects.