Super Paper Mario/Villains

Count Bleck
The main villain of the game, he has many minions under him.

Nastasia
Count Bleck's assistant. She has hypnotic and brainwashing powers.

O'Chunks
A strong, but very unintelligent minion of Count Bleck.

Mimi
A shapeshifting cute girl/giant spider who is a minion of Count Bleck.

Dimentio
An evil magician, also a minion of Count Bleck, who controls his own dimension (Dimension D) and can create many copies of himself.

He turned into Super Dimentio once but Luigis Brother, Peach and Bowser defeated him.

Mr. L
Is he Luigi? He builds giant robots in order to fight the heroes. He probably became a minion of Count Bleck through brainwashing...