Dr. Mario is Mario's medical counterpart.
He appeared in a old small spin-off series called "Dr Mario"WHICH IS BASICLY TEDRIS MARIO STYLE.
He appeared also in SSBM as a playable character INSTEAD OF WARIO, but he did not appear in SSBB BECAUSE OF THE CLONE PROBLEM. OR JUST THEY RAN OUT OF IDEAS.
Some people want him to return in SSB4. Here's his new moveset:
Standard B: Pill toss
Side B: Say Aah
Up B: Stethoscope
Down B: Diagnose: he diagnoses the nearest opponent with something they're probably diagnosed with, for example: Sonic with ADHD or Kirby or Dedede with an eating disorder
Final Smash: Injection