Third non-member pet in the game available to public , first is Dark Wolf and second is the Balloon Dragon from JACON.
The Chuckles Skull sends you on a quest to bring Chuckles back from the undead, making him undead-dead? Death challenges you to make him laugh, or be sent to the void. Your character will make him laugh, and he will toss you Chuckles head.
You don't receive a Chuckles pet upon quest completion
More quests are coming in the chain
If you click the Chuckles skull twice really fast while hes laughing he spins around until you move.
After you do quest the ! disapears and you can't do the quests again till a new quest comes out.