The barrel train kart from "Mario Kart: Double Dash!!" from the Gamecube. I've got my hand on the ripped model from the game files through the MKDD Speedrun community I'm in and used it as a base to make this model. Since the wheels are added dynamically ingame and weren't really suited for 3D printing I added simplified wheels on my own.
I also thickened the thin handlebar in the back and connectors on the front.

(Since the pictures were taken I added the outer ring to the wheels to make painting easier, I haven't painted this version yet though)

If you have questions feel free to comment or message me directly.