Here is the full list of all 12 Zippy the Circle Challenge (Level 5C, Level 6C, and Level 7C) (EU) trophies - there are 11 gold and 1 platinum.
Great job! You got all the trophies! Congratulations!
Complete Level 5
Get the medal for Level 5
Complete Level 6
Complete Level 6 with the timer lower than 500
Complete Level 6 with the timer lower than 400
Get the medal for Level 6
Jump on a spring
Complete Level 7
Complete Level 7 with the timer lower than 475
Complete Level 7 with the timer lower than 375
Get the medal for Level 7