No
he didn't exist when Mario 64 was made
Which Mario? There are a lot of Mario games, you know. Or did you mean the literal one? Beat up Mario? Na-ah. He doesn't exist.
No. Yoshi (The character) does not exist in Super Mario Galaxy.
Yoshi Valley does not exist in Mario Kart DS.
He doesn't exist in any of the Mario Kart games.
no
It doesn't exist for it.
There are no power flowers in Super Mario 64. However, I do not if they exist in Super Mario 64 DS.
Pac-Man doesn't exist in Mario Kart DS.
It's Yoshi, Mario, Luigi and Wario.
These products do not currently exist.