Dr. Stewart (ドクター スチュワート?), sometimes referred to as Dr. Robert Stewart, was a licensed medical doctor and charismatic surgeon with legendary surgical skills. However, he was given the opportunity to become an F-Zero pilot due to the death of his father. In the game F-Zero GX, he is 42 and his fathers' name was Professor Kevin Stewart - the original owner and creator of Dr. Stewart's F-Zero vehicle, the Golden Fox.
His father, Kevin Stewart, was a famous F-Zero pilot and professor who also raced in the #3 Car. Before that, his father used to race in the more dangerous underground races before becoming a legit racer. In those times the F-Zero races were a far more bloody affair and as a result, he urged his son, Robert, to instead become a doctor. Robert became an accomplished medical doctor, but soon the race track called him and he became a pilot as well.
Although father and son raced together for some time, Dr. Stewart eventually set out on his own in the underground leagues. Eventually, he heard that the #3 racer in one of the F-Zero races had been killed. Although it was not confirmed to be his father, Dr. Stewart was able to eventually confirm that his father had died or had been perhaps murdered. Dr. Stewart subsequently retooled his father's Golden Fox and became a pilot in the F-Zero races as well where he raced against the likes of Captain Falcon, Pico, and Samurai Goroh.
Seven years after his F-Zero career started, the Horrific Grand Finale occurred. In the aftermath he put his skills as a surgeon to use (himself avoiding injury) and thanks to his skills, none of his patients died. When the new F-Zero X races began, he re-entered the Grand Prix, even though the prize went to Captain Falcon. He re-entered the following year aiming to win the prize.
Same thing went during the GX Grand Prix, though, of course, he did lose to Captain Falcon who won the lighter half of the Championship Belt and raced against the Champion of the Underworld, Deathborn; who was rumored to cause the Horrific Accident earlier.
He also made an appearance in the anime, F-Zero GP Legend, as a mentor and physician who joined the Elite Mobile Task Force next to the leader, Jody Summer. He often gives advice to those in need as well as putting his medical skills to the test, especially since he took Jody to a special hospital related to cyborgs, to which he only informed Rick Wheeler of. In the Japanese version, it was revealed by Falcon that he informed him and Jody personally that the galaxy would meet certain doom by Black Shadow in the 23rd century, so they must awaken Rick from cold sleep in order to combat Dark Million. Zoda was reanimated on account of the savior's coming, and the medico was the only one who remained confident in the legend as well as reviving Rick.
In the GBA game, he was only seen briefly during Jack Levin's, Captain Falcon's and Jody's Story Modes, though he wasn't one of the main characters there and could still be an opponent during many of the races. He was the one who assigned Falcon to search for Dr. Clash, and it was mentioned they go way back as a reference to the original F-Zero. Of course, he was one of the main playable characters in F-Zero Climax.
Dr. Stewart is a male who has a straight face, has dark brown hair and wears a flashy yellow jumpsuit, accented by his blue boots and gloves. He wears a flowing red scarf around his neck that hangs out over his suit. In an interview in F-Zero GX, he claims to wear this scarf as a symbol of friendship. He is also quite the ladies' man, as evidenced in the SNES comics. 
He debuted with the November 21, 1990 release of the video game F-Zero in Japan. An eight-page comic was included in the manual of the 1990 SNES game, containing the original character designs of Dr. Stewart and the three other original pilots, as well as the F-Zero announcer - Mr. Zero
- It was stated on Lap 28 in the anime that Dr. Stewart's birthday is the same as Valentine's Day, February 14.
- It was also mentioned that he was born in Mute City, and his blood type is AB.
- He appears in Super Smash Bros. Ultimate as a spirit and his fight is represented by Dr. Mario. In the World of Light mode, Dr. Stewart runs a Dojo.
- Not to be confused, but Kevin Stewart wasn't played in the original F-Zero. His son, Robert, can be played throughout the series.
- Anthony Ropkin's machine looks remarkably similar to the Golden Fox, only it's painted red; rumor has it it's known as the Red Fox.
|Introduced in F-Zero|
|Captain Falcon - Dr. Stewart - Pico - Samurai Goroh|
|Introduced in F-Zero X|
|Antonio Guster - Mrs. Arrow - Baba - Beastman - Billy - Bio Rex - Black Shadow - Blood Falcon - Dr. Clash - Draq - Mr. EAD - Gomar & Shioh - Jack Levin - James McCloud - Jody Summer - John Tanaka - Kate Alen - Leon - Michael Chain - Mighty Gazelle - Octoman - Roger Buster - Silver Neelsen - The Skull - Super Arrow - Zoda - Super Falcon (through cheat code)|
|Introduced in F-Zero: Maximum Velocity|
|Megan - Mickey Marcus - Jane B. Christie - Nichi - Lord Cyber - Alexander O'Neil - Blitz Wagner - Kent Akechi - Kumiko - Professor Yazoo Jr.|
|Introduced in F-Zero GX/AX|
|Phoenix - Princia Ramode - QQQ - Don Genie - Terry "Digi-Boy" Getter - Dai Goroh - Dai San Gen - Lily Flyer - PJ - Deathborn - Spade|
|Introduced in F-Zero: GP Legend|
|Rick Wheeler - Lucy Liberty - Misaki Haruka - Lisa Brilliant|
|Introduced in F-Zero Climax|
|Berserker - Clank Hughes - Death Soldier|
| Racer #02|
| Racer #03|
| Racer #04|
|Characters of F-Zero|