There's a new doctor in the house in Nintendo's mobile game Dr. Mario World. Yes, after the arrival of Piranha Plant last December, the one and only Petey Piranha has now been added to the ever-expanding roster in this free-to-play title.

Petey Piranha originally started out in Super Mario Sunshine on the Nintendo GameCube and since then has gone on to star and cameo in a number of Mario games from Mario Kart: Double Dash!! to Super Smash Bros. Ultimate.

In Dr. Mario World, Petey Piranha joins a long list of questionable doctors such as a triple stack of Goomba, Dr. Dolphin, Nabbit and Baby Mario and Baby Luigi. Who would you choose to visit for your regular check-up?

Will you be booting up Dr. Mario World on your mobile device to see Petey Piranha in action? What other crazy characters would you like to see join the cast? Share your thoughts down below.