Dr. Mario is the persona Mario assumes in the Dr. Mario series. Under this identity, Mario dons a lab coat, a head mirror, and a stethoscope around his neck. Debuting in his eponymous game, Dr. Mario and his assistant Nurse Toadstool work at the Mushroom Kingdom Hospital, where he eliminates viruses and other diseases by using capsules, a premise that has been the standard for subsequent games starring him. Dr. Mario also appears as an unlockable fighter in Super Smash Bros. Melee, Super Smash Bros. for Nintendo 3DS / Wii U, and Super Smash Bros. Ultimate, where he is considered a separate character from Mario. The Super Mario Kodansha manga also portrayed him as a separate character from Mario, with Nurse Toadstool being a separate character from Peach.