April Fools!

Obtainability
Teleport to the Old Oak map.

You'll find yourself in a dense forest. Look around, and you should see something pink behind the trees. Run towards it.

Now, all you have to do is touch the pink thing. If you get close enough to it, you'll see that it's actually a giant model of Gurt.

By touching the Gurt model, you'll get the April Fools! Badge and also the Gurty skin.