FoxamaniaG 50

This is one of the last achievements you will unlock.
The entrance to the WiggleMania challenge is on the far left of Foxington.
Getting hit once means a restart. Do NOT try collecting any diamonds/coins that do not appear between rounds (for example, don't try to go for the diamond in the first phase of 3rd stage, it's not worth it when you can easily invalidate the run).

There's 4 stages which will be increasingly difficult and making you go bald (I'm not joking, the hit boxes are so ridiculous that you will very likely be off put by this).

First stage - 4 birds, each for 4 squares, when killed, they spawn 4 flowers on the corresponding squares. Kill each group first (first kill the bird, then go in the middle of the flowers and double jump before they attack. Rinse and repeat.) No environmental hazards.

Second stage - 4 big caterpillars, three times. Once all of the caterpillars are killed, the next 4 spawn. Environmental hazard - Lava balls from random tiles.

Third stage - 4 normal bees on set patterns, times 3. Kill all bees, the next ones spawn. Environmental hazards - Tiles turn to spikes at set patterns. Also, lasers.

Fourth stage - Increasingly 1, 2 and 4 fast-shooting bees and 1 magma monster. First take care of the bees, because they can and likely will do you dirty. The magma monster takes 3-4 hits. Do NOT kill him by jumping as the purple sphere that comes out of it will spawn right over it and almost 100% WILL hit you if you do (Do the final hit, by hitting it with your tail.). The purple sphere will come to you for a few seconds WHILE the next phase (next enemies) begins, so you need to be REALLY careful. Environmental hazard - lasers.

You can combine this with the achievements for completing this challenge and completing it while having the Maxi Mullet equipped, but I STRONGLY recommend that you do those two first.