Pokemon Ultra Sun Decrypted High Quality 【Bonus Inside】

A "decrypted" ROM has this security layer removed, which is necessary for emulators like Citra to read and execute the game files.

The vanilla game runs at a low resolution (240p) with thick black outlines on character models. You can drastically improve this on an emulator: pokemon ultra sun decrypted high quality

It sounds like you're looking for a related to Pokémon Ultra Sun — specifically a decrypted, high-quality version of the game. A "decrypted" ROM has this security layer removed,