Pokémon Stadium and Pokémon Stadium 2 – Pokémon cannot be transferred into these games. (Explanation Given)
So, Pokémon Stadium 1 & 2 lack connectivity with other Pokémon games on NSO, and based on my mentions, people are irate about this.
Let me explain why this is the situation and isn't an easy fix.
Simply put: The Game Boy games aren't on the Switch
Thread/ pic.twitter.com/ca7BGSpUOs
— Joe Merrick (@JoeMerrick) September 13, 2022