Could it be over about a hundred years with a two group of Pokémon Trainers are just like Lucas and Dawn (from the past and to a new beginning of a future it might one of their family ancestors), if Lucas is happy to be with Dawn as best friends they would feel the same to a future-true love living in Sinnoh their home.

So thing is that Pokémon starters are Rowlet, Cyndaquil, and Oshawott to guide them on their journey throughout the land, and will there be a whole kinds of Pokémon to search and catch one of them and battle with them from a couple Generations (Grass, Fire, Water, Bug, Normal, Poison, Electric, Ground, Fairy, Flying, Fighting, Psychic, Rock, Steel, Ice, Ghost, and Dragon) they might be hundreds of them in the millennium regions of Sinnoh (And that's just in The Legend of Zelda: Breath of the Wild video game version).

A Poké Ball/An Older Model Poké Ball was the same version in Pokémon 4 Ever.

The Rumours would like to take a guess if I do may say so