Halifax

Hi, I am new, I am starting the pokemon platinum and I have noticed something strange. When you weaken a rival pokemon and it will attract another, shouldn't it be asking you if you want to switch just like the original pokemon? That makes the game very difficult. Or do I have to activate it somewhere? I have been playing pokemon for a long time and this seems strange to me.

I would like to know if pokemmo emulates the game like a normal emulator would, i.e. if the game's story remains intact, the gameplay and stuff, just adding the exchanges and other online interactions. And I'd also like to know if they would add Pokémon black / white 2. Thanks so much for reading.