Guise, thought deep and hard but;
The campy, happy Turbo on the App is most likely what his creators (in the WiR universe, not Disney) intended him to be. Cute, that typical good-guy face, and looks like something out of 20’s Mickey cartoons meets Astro Boy, so the app Turbo’s art is probably what came first, seeing as it’s plastered all over the original Turbo-Time cabinet in the movie.
THEN, they went to a spriter and said “Here, sprite this character!” That guy must’ve been tripping balls and gave cute little Turbo some form of anemic jaundice and nasty grillz, making him this lil’ mofo:
Now he’s a literal speed demon! Turbo-tastic!
Also, in the app I zoomed into someone’s screencap of TT and: <-Holy shit ain’t that how he appeared in the movie! Nasty grin and them baggy jaundiced eyes and all? That’s not the cute guy on the title screen!
So there’s 3 Turbo types in this game. His original “concept”, his 8-bit form, and Disney managed to sneak his fully-rendered model from the movie. Bravo!