Surely it's only a matter of time before Nintendo works out what they can do about this, but in the interim it's pretty great watching the development unfold.
It's a project from YouTuber CryZENx, whose channel is filled with a variety of other UE4 conversions for other Nintendo properties. He's built small slices of Legend of Zelda, Princess Peach, Sonic The Hedgehog, Pokemon, Super Mario and more.
But the project that's coming along the most is their efforts with Mario Kart, with the latest downloadable build even containing functional multiplayer. You'll have to download the package from Kim Dotcom's MEGA service, and you'll only be able to connect to a European server -- but it does work.
If you want to check out the package yourself, you'll need to know the controls:
Character change button : 1 Left & Right : A and D Drive forward or Backwards : W and S Drifting : Left Shift Jumping : Left crtl Looking behind Camera : C FREE camera : V VAAS ONLY DANCING MOVE : SPACEBAR Courtesy of CryZENx
"Wanna play online then make sure to choose the same Steam Download Region LAN EVENT (Europe) in your Steam after starting the game, steam will showing : you are ingame : Spacewar game.. that means its fully working with steam," the creator wrote in a YouTube comment.
It's probably something that most people won't end up trying for themselves and I can't imagine this project going too much further down the road without running into some trouble. But it's cool to see the kind of small projects people have been publishing in the year since Unreal Engine 4, CryEngine 3 and Unity all had their price war. It's made game development much more accessible for a much wider audience, and it's also opened up the door for cool little cross-overs like this.
Shame it probably won't go any further, but you never know.