Here is the full list of all 58 Saturday Morning RPG trophies - there are 52 bronze, 3 silver, 2 gold and 1 platinum.
Win 225 battles
Defeat Wave 15 of Endless Battle
Win a battle against the Frizzies
Collect all 128 Scratch N' Sniff Stickers
Defeat Wave 10 of Endless Battle
Defeat Wave 5 of Endless Battle
Win an arena battle
Walk away from the Bertha fight
Hire Charles Cheezer to "talk" to Henry
Reach Level 21
Make Kev the robot band frontman
Make Captain Crunch the robot band frontman
Use the safety scissors to pull an enemy across a bomb
Make Bearris the robot band frontman
Defeat Adrian the cyberdaemon, lord of pizza
Crane kick Billy
Complete 5 different episodes
Win 150 battles
Defeat the Trash Monster
Compact Ben in the trash compactor
Save Ben from the trash compactor
You called Jenny for a good time
Defeat the Lizard King
Get Todd and Mary back together
Make Chris the robot band frontrock
Complete 4 different episodes
Shoot your eye out with the BB Gun
Use the decoder ring
Stop the HOOD forces in Shadow Valley
Win 100 battles
Get a triple S ranking in battle
Defeat Super Computah
Score 200 Righteous Defenses
Decide to fight Bertha for Bobby Jett
Force Blake to go on a date with Sarah
Hook Sarah up with the Basketball Team
Hook Sarah up with Randy Greenback
Hook Sarah up with Matt Conroy
Hook Sarah up with Chris Rock
Reach Level 11
Buy Henry's ticket for Ash
Play an episode twice
Destroy the gruel in Episode 2
Win 50 battles
Retry a fight and win
Complete 2 different episodes
Don't destroy the gruel in Episode 2
Max out your multiplier
Beat an entire episode without dying
Collect dinner for a friend
Get a battle rank of A or higher five different times
Get a righteous rating on a weapon slider 10 times
Scratch all five stickers before battle
Win a fight without scratching any stickers
Defeat an enemy with a critical punch
Unlock all other trophies
Reach Level 50
Defeat Evil Marty