Cemu has made significant progress in terms of game compatibility. Many popular Wii U games are now playable, including:
However, emulation itself is perfectly legal. The general rule of thumb for "ROM Wii U Cemu" usage is: rom wii u cemu
These are "decrypted" folders. They are easy to run because they don't require external keys, but they consist of many small files which can be messy. Cemu has made significant progress in terms of
Cemu supports several file types, but some are more efficient than others: .wua (Recommended): rom wii u cemu