For this achievement you must purchase the maxi-mullet from the shop (you'll need this for the Sharp Dressed Fox and The Price is Right achievements) then you must wear it and complete the Wrigglemania challenge. This challenge consist of four rounds the first round is 4 birds when once you kill one they spawn 4 flowers, round two is three waves of 4 caterpillar with fire turrets, round three is three waves of 4 bees with spikes and lasers, the last round checkpoint pops up here is another three waves of the rock monsters that take three hits to defeat, bees that shoot their stingers twice, lasers, and lastly once you defeat all the enemies a purple fireball that chases you. Once you complete the third wave in round 4 you will win and earn the achievement.