I got traded a female Chimchar in a beastball and it has pretty good IVs, I was gonna use it to breed an Infernape for my team but I'm wondering if it's possible to get the Sinnoh starters in anything other than a regular Pokeball without hacking
In Ultra Sun and Moon you can catch a Monferno in any ball via Island Scan, and through breeding you can pass that ball down to a breeded chimchar
Source: Experience