If you want to build a library of Wii U ROMs without legal risk, you need a homebrewed Wii U console.
A: For graphics, yes. For stability, yes. For online play, yes (via Pretendo). For the authentic GamePad experience, no. wii u rom
If you own a Wii U disc, dumping it for use on your PC is a legal gray area but morally sound for preservation. If you never bought the game, the law is clear: you should not download it. However, for the delisted, the lost, and the region-locked, the ROM community remains the final guardian of playable history. If you want to build a library of
The Nintendo Wii U remains one of the most fascinating case studies in video game history. Despite a troubled commercial lifespan that saw it eclipsed by the massive success of the Nintendo Switch, the console harbored a library of high-quality exclusive titles. From the sprawling streets of The Legend of Zelda: Breath of the Wild to the creative chaos of Super Mario Maker and the chaotic fun of Mario Kart 8 , the Wii U library is a treasure trove of gaming excellence. For online play, yes (via Pretendo)
The only universally legal method is creating your own backup copies, often referred to as "ripping" or "dumping".