Pokemon GO; that's the only non-official game which feels like official game, and also have the feature to link it with Pokemon HOME and send all Pokemon barring Mythical, Pokemon Trainer Club and follows many of the mechanics as in mainline games, and also has official Pokemon moves, unlike in Pokemon UNITE, Pokemon Masters EX. Although it requires real-life friends to make gameplay interesting, but I am faring decently enough even though I play alone......
And as it happens here, we will get access to newly released Pokemon in Legends: Z-A sooner or later.
Do you enjoy climbing/trekking mountains ?