Despite the legal hurdles in finding a ROM, the technical side of emulating the game is well understood, thanks to the powerful for Wii U.
Which of those would you prefer?
When searching for "Pokémon Rumble U," you will rarely find a standard .iso file (common for disc games). Instead, you will encounter: Pokemon Rumble U Rom Download
A ROM should never be an executable file. If a site asks you to run a program to get your download, close it immediately. Despite the legal hurdles in finding a ROM,
Download the latest stable version for your operating system. Pokemon Rumble U Rom Download
: Includes all 649 Pokémon from the first five generations (up to Pokémon Black 2 and White 2 ).