If you registered Pokemon you just choose the ditto on the far left and choose the registered set you made.
Pokemon Stadium Pokemon Stadium 2 Hey You, Pikachu! Pokemon Puzzle League Pokemon Snap
yes
No, they were separate.
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.
Yes Entei, Raikou and Suicune are all available as rental Pokemon in Pokemon Stadium 2 you can choose them at any time as long as your not playing little cup rules.
Pokemon Stadium Pokemon Stadium 2 Hey You, Pikachu! Pokemon Puzzle League Pokemon Snap
Pokemon stadium 2,yes
Complete the Gym Leader Castle mode and Stadium Modes to earn VS Mewtwo. Defeat Mewtwo to earn Round 2. When you choose the Prime Cup you can select Mew as a pokemon.
yes
brawl on Pokemon stadium 2 15x
No.
No, they were separate.
To unlock the original Pokemon Stadium, you must play on Pokemon Stadium 2 10 times.
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.