I must say, Mario characters are very smart. Peach and Daisy are both doctors and the rulers of their own kingdoms, Bowser is a doctor himself, has invented complex machinery, is himself a ruler, has proven himself competent enough to be a dangerous enemy multiple times, and can actually be capable of trickery, Wario has a doctorate, was able to build mind control devices, a device that could send him into TVs (that should be mentioned in his profile, Immersion), is the CEO of his own microgames company, and can fly a plane, Bowser Jr became a doctor at a ridiculously young age, invented a formula to revive the dead, could lead the kingdom in his father's absence, could build robots, and has been stated to be smarter than Bowser himself, Luigi is a plumber, doctor, engineer, and ghosthunter, is an expert in geography and landmarks (as seen in
Mario is Missing), and was able to help fight off an alien invasion as a baby, and Mario himself is a plumber, carpenter, vehicular master, archeologist, physician, game company owner, skilled historian, incredibly skilled doctor who invented vitamins that can instantly cure someone, could help fight off an alien invasion as a baby, and was able to solve a mystery that left many scientists stumped.
In short:
- Dr. Mario: Genius
- Dr. Luigi: Gifted
- Dr. Princess Toadstool Peach: Gifted
- Dr. Princess Daisy: Gifted
- Dr. King Bowser Koopa: Extraordinary Genius
- Dr. Prince Bowser Koopa Jr: Extraordinary Genius
- Dr. Wario: Extraordinary Genius