No, they were separate.
Pokemon Stadium Pokemon Stadium 2 Hey You, Pikachu! Pokemon Puzzle League Pokemon Snap
yes
yes
Pokemon Stadium 2 allows you to utilize all 251 pokemon however some are only available through use of the Transfer Pak. Mew and Celebi can be unlocked by completing all modes on Round 2.
It's not possible to capture Pokemon so no. You can unlock pokemon like Mew and Celebi.
Pokemon Stadium Pokemon Stadium 2 Hey You, Pikachu! Pokemon Puzzle League Pokemon Snap
Pokemon stadium 2,yes
yes
brawl on Pokemon stadium 2 15x
No.
To unlock the original Pokemon Stadium, you must play on Pokemon Stadium 2 10 times.
black and white 2
It is not possible to utilize Firered for Pokemon Stadium 2 as the Transfer Pak is only compatible with Gameboy games.
Search for Pokemon stadium on Google, then when that page loads press on shopping at the top of the page and that will take you to a bunch of Pokemon stadium games.
yes
Pokemon Stadium 2 allows you to utilize all 251 pokemon however some are only available through use of the Transfer Pak. Mew and Celebi can be unlocked by completing all modes on Round 2.
Mewtwo isn't unlockable in Pokemon Stadium 2. You will need to register it from either Red, Blue, Yellow, Gold, Silver, or Crystal version.