@Mars02 It is using the ROM for Super Mario Bros, however the emulator is running at a slower framerate. If I remember correctly the Wii Virtual Console ran at 59.94FPS, so it would be safe to assume that the Wii U Virtual Console runs at the same framerate as the Wii Virtual Console.

Hello, I noticed that there was a run under the PAL section which got a 4:59 on the Nintendo Switch version of SMB1:

https://www.speedrun.com/smb1/run/y21qld5z

While technically it was ran on a PAL switch, the game itself was the NTSC version. Is it possible for this run to be relisted as NTSC-U or NTSC-J?

It's a lag frame, there is no way to perform any type of arbitrary code execution at any point within the game currently, the game is just simply slowing down because there are too many moving objects on the screen at one time and the CPU can't handle it.

This image should also help visualize what I mean.