Here is the full list of all 12 Skatemasta Tcheco (HK/TW) trophies - there are 11 gold and 1 platinum.
Unlock all other trophies
Jump on an enemy
Air dash an enemy
Collect a health pack
Collect $50,000
Collect all friend name letters in any level
Defeat any in the game
Choose not to save your game when prompted
Defeat 3 or more enemies in a combo
Finish the level "Concrete Jungle"
Finish any 2 levels in the game
Collect $25,000