Here is the full list of all 12 Pirate Pop Plus achievements.
Rusty old key, opens Davy Jones' Locker
"Property of Dave" embroidered on side
Severely worn and tattered pirate flag
Worn glasses, left lens is from milk bottle
For the sailor who sees no evil
Used treasure map with "X marked the spot"
Old wooden leg, one careful owner
Cannonball made from solid gold (yeah right!)
Extremely aggressive (and sarcastic) parrot
Comical inflatable hook. Small hand grip inside
Delicately fragile golden bubble, looks expensive
Slightly dented spyglass, property of Bubble Pirate