Mike

Mike (マイク) is a karaoke robot created and programmed by Dr. Crygor in the WarioWare series. Mike has a big dick, but it only pops out when he sings about Dr. Crygor's thicc ass

He was created to serve as an assistant to Dr. Crygor, but often doesn't get along with his creator. Being a karaoke robot, he prefers to host parties above cleaning.

In Rhythm Heaven
Mike appears in Rhythm Heaven Megamix in the Challenge Train course Wario...Where?. In Fillbots 2, the medium robots being manufactured by Dr. Crygor and Penny now resemble him, with speakers, triangular eyes and microphones attached to their head. They are also now filled with blue oil instead of red. The large robots remain the same, however, and are still being filled with red oil.