Region Free? Region manifest? Help

Hey I’m new to citra and I’d like to know what is Region Free or Region manifest and if there is relation to these concepts, thats because when im at pokemon ultrasun and ultra moon when i click to link battle and then individual battle it crahses the citra and before starting the game next to the game says region free so id like to know what is it and if someone has the same problem or can u solve it

Region free means that the game is literally region free, i.e: you can play on any 3DS from any region.

Region manifest error messages are about system archives, redump your system archives if citra is giving warning about it.

quick update: we’ll be releasing a reverse engineered region manifest very soon, which eliminates the need for people to dump their region manifest