how are people managing to evolve eevee into espeon?

for go there's also the name trick if you don't want to do the walking: rename eevee Sakura before you evolve and it comes out espeon. works once per account, after that you're back to the buddy method.

which game? it's different in go versus the main series. main series (scarlet/violet, sword/shield etc): get its friendship high, then level it up during the DAYTIME. same conditions at night gives you umbreon, which is the classic mistake. if you're on a game with fairy types, don't let it know a fairy move or you can end up with sylveon instead. pokemon go: make it your buddy, walk 10km with it, then evolve during the day while it's still your buddy. there's also the name trick (rename it sakura) that works once per account.