This often happens if the decryption process was incomplete or if you are missing the "System Shared Fonts" in your emulator.
The "Ultra" versions of Gen 7 are prime targets for modders. With a decrypted ROM, creators can produce: pokemon ultra sun decrypted
By default, Nintendo 3DS games (found in .3DS or .CIA formats) are encrypted with proprietary keys to prevent piracy and unauthorized tampering. While a physical 3DS console can read these encrypted files using its internal hardware keys, a computer or an emulator cannot. This often happens if the decryption process was