I am a noob with roms and emulators, but I would like to give this a try. I have downloaded Cemu and the RR levels, but how do I get this to work? I believe I have to download an NSMBU rom (to replace the original levels with the new levels), but where do I find that?

I'm not a expert of Wii U emus either. @ILoveSMB can help you for that tho

But I recommend to play on a real Wii U for a better experience if you have one. Also if you need help for the setup on console I can help you ^^

Also for the ROM we don't provide ROMs because it's illegal

The only thing I can say is Google it

I have a wii u and that would actually be even nicer It would be awesome if you could help me!

Oh nice ! So can we continue this on Discord DMs ? To avoid forum spam

Sure! But do you have someting like a link bc I'm not a pro with discord

Just create a Discord account and send me a friend request (Romain#0001)

You can also join the nsmb series Discord server : https://discord.gg/dCJ2WSn

just sent you a message on discord

I mean, a friend request

If you want to give emu a try I'll help you
ILoveSMB#0606