Complex sentence: Martinet has voiced this title character of Nintendo's flagship video game franchise since 1995, and he also voices related characters such as Baby Mario, Luigi, Baby Luigi, Wario, Waluigi and Toadsworth.
Split into simpler sentences: Martinet has voiced this title character of Nintendo's flagship video game franchise since 1995. He also voices Baby Mario, Luigi, Baby Luigi, Wario, Waluigi and Toadsworth.