So, I was playing my Pokémon Silver, and suddenly when I entered the Pokémon League building, I was teleported to that place. Can somebody please say what is this place and how should I escape this?

[Violet] I got shiny Drilbur and evolved it into Excadrill.

[Violet] I got shiny Crabrawler and evolved it into Crabominable.

[Violet] I got shiny Metang and evolved it into Metagross.

Got a little whirlipede

[Violet] I got shiny Seviper.

throh haters in shambles

[Violet] I got shiny Delibird.

Me rn:

Btw good night