The Phantom, also know as Tom Pham, is the sixth boss in Mario + Rabbids Kingdom Battle.
He is a Rabbid, Boo balloon, and radio mix. He has hair and costume look sort of like George Washingtons or something. He also holds a handkerchief and is transparent on the underside where you can see the radio, then has a normal Rabbid underside when you hit the spot light(s).
He hates Mario for some reason, and mocks him, like saying the only words he know is "It's a Me, Let's a Go". He wants him to retire, as well.
"Bwah...Hum... a-ehm, Bwaaaaah-Bwah-Bwah BwaaaaAAAAAAAAAAAH!
Bwah Ahem-har... Humph!
You think yours is a real moustache?
Who's done me a thousand wrongs, ever since Donkey Kong?