Here is the full list of all 24 Mekazoo trophies - there are 12 bronze, 3 silver, 8 gold and 1 platinum.
Collect your first gear
Unlock the frog
Recharge your shield
Complete All Achievements
Alter your appearance in the Mekapod
Unlock all platings, glows, and costumes in the Mekapod
Beat a Level in co-op
Beat a Boss in co-op
100% completion
Collect 10 Gems
Collect 100 Gems
Collect all Gems
Equip boss costume
Collect all time medals
Collect all Bounty Medals
Collect all Stay Alive Medals
Find all secret switchers
Unlock the wallaby
Unlock the panda
Exorcise the armadillo
Unlock the pelican
Collect 25 gears
Collect 60 gears
Collect a Gem via 400 mekaballs