Skullrock

Skullrock is a villian who appears in the Alice in Wonderland episode "A Skeleton's Surprise".

Skullrock was hired by The Queen of Hearts to attack Sticks the Skeleton for not inviting her to his "unbirthday". It crashes the party, and attempts to attack Sticks. The Cheshire Cat distracts Skullrock by getting in its way, whilst Alice shoots energy spheres from her sceptre at it. Skullrock meets its demise when Alice uses her sceptre to break the floor it was standing on, causing it to fall to its death.

Trivia

 * Skullrock is the only villian on the show to be referred to with gender-neutral pronouns. Other gender-neutral villians, such as Mushrat and Rain Can, are referred to as a specific gender, but Skullrock is simply referred to as "it".