Triple Treat

Triple Treat is the main villain of Season 5. The design unification brief states that "Even though Applejack has worked her whole life to bring the best produce to Ponyville, Triple Treat comes in to ruin this.  He has created something so spectacular that nopony believes it until they see it: non-perishable produce.  Well, it turns out the produce may not be perishable, but the ponies that eat the disgusting filth sure are."

Trivia

 * His reasoning of punishment is his greed.
 * His gemstone is an amethyst.