Here is the full list of all 43 Knack 2 trophies - there are 27 bronze, 12 silver, 3 gold and 1 platinum.
Defeated 300 enemies using kicks.
Defeated 50 immobilized enemies.
Broke the blocks of 50 enemies.
Defeated 100 enemies using Jump Kicks.
Cleared one chapter on the Very Hard difficulty level.
Cleared a Time Attack stage.
Cleared all chapters on the Easy difficulty level or higher.
Cleared all chapters on the Normal difficulty level or higher.
Defeated the last boss.
Acquired all gadgets.
Defeated all Titans.
Defeated 700 robot enemies.
Learned the Ultimate Move from Ava.
Defeated 10 enemies as small Knack.
Defeated the relic monster that Xander created.
Defeated Gundahar.
Learned the Boomerang from Ava.
Acquired your first Knack medal.
Defeated Rothari.
Defeated 500 goblin enemies.
Ran 26.2 miles.
Learned the Hook Shot from Ava.
Stunned enemies 50 times with sunstone bombs.
Found 10 treasure chests.
Found 30 chests containing relic energy.
Acquired your first crystal relic.
Defeated 300 enemies using punches.
Learned the Heavy Punch from Ava.
Completed your first gadget.
Performed your first Knack upgrade.
Acquired your first gadget part.
Acquired all trophies.
Defeated 50 enemies using parries.
Unlocked your first Crystal Knack.
Equipped a combo meter and landed a 100-hit combo.
Cleared a Coliseum Attack stage.
Cleared all chapters on the Hard difficulty level or higher.
Acquired 50 Knack medals.
Learned all super moves.
Learned all basic power-up skills.
Acquired 70 Knack medals.
Achieved 5 stars in every Time Attack.
Achieved 5 stars in every Coliseum Attack.