Baby Luigi is the infant form of Luigi. He makes appearances in the Longplays and he's normally seen with Baby Mario and he loves Chain Chomps, Baby Luigi also is part of the go karting competitions that have a large amount of characters.
- Mario Kart: Double Dash!! Longplay
- Super Mario Galaxy 2 Longplay
- Mario Kart Wii Longplay
- Luigi's Mansion 2: Dark Moon Longplay (mentioned)