Here is the full list of all 12 Rag Doll Kung Fu: Fists of Plastic trophies - there are 7 bronze, 4 silver and 1 gold.
Damage three opponents with a single attack
Play all four Multiplayer Game Modes
Execute every motion sensor-based move
Earn Bronze on all challenges
Earn Silver on all challenges
Earn Gold on all challenges
Hit an opponent in the air with all three special attacks before the opponent lands
Swing from one place to another and damage an opponent in between
Hit an airborne player with three consecutive Lightning Balls
Score a goal by shooting the fish into the basket with a Lightning Ball
Throw the fish to a team-mate who then scores within one second
Defeat an opponent who is Grabbed by your team-mate