Baby Wario is the baby version of Wario, who will appear in Yoshi's Island DS, along with Baby Mario, Baby Peach, and Baby Donkey Kong. Not much is known about him, but it looks like he was greedy even as a child. His special move appears to be the ability to grab coins with a magnet.
After seeing Baby Wario, many fans have been hoping to see a Baby Waluigi, while others want the babies to stop.