Antasma

Count Octoberus von Antasma is the Main Antagonist who teamed up with Bowser (until he was betrayed) in Mario & Luigi: Dream Team on Nintendo 3DS. But not only that he is the Dark Alchemist of Nightmares. In Super Princess Peach: Ally or Enemy, he is also Claire Tasha Bat's Evil twin Brother banished from the order of Swoopers and Fangs to the Dream world due to the Jealousy and Power coming from the Dark Gem.