The Mean 6

The evil clones of the mane ponies behave the opposite of their real counterparts: Mean Applejack always lies, Mean Fluttershy is cruel, Mean Rarity is greedy, Mean Rainbow is lazy and disloyal, Mean Pinkie is always grumpy and bored, and Mean Twilight is an unfriendly and conniving schemer.

Example of:
The Psycho Rangers