You were wondering around in a abandoned underground laboratory and it was a big place, you see a machine that can make portals and accidentally you turn it on, and you got suck it, in the other side, you are laying on the sand and you sit up and see that you are in a big island and sees the waves and also you see a massive house, until you were spooked by a woman behind you, she has similarly as a Pokémon that you have remember in a game

Silver: hello, um how did you got into this island?