I recently got Project64 and Yoshi's Story ROM, I got it from a site that I don't recall, but I'm pretty sure it's not Emuparadise because they're ROM was taken down. I loaded it up, and the Nintendo logo showed up, but no Yoshies were speaking, it started on just one level. I was playing as a Purple Yoshi, something odd because there wasn't a Purple Yoshi in the game at all (only in the BETA). I was able to pass the level until it actually went to the level select screen, it was known as Page 0: "...".
The Yoshi Select screen showed no Yoshies except for Purple and Brown Yoshies. I could even play 2 players, which I wasn't able to get to work. I picked Purple Yoshi (because brown is colored like "shit").
I managed to save Red Yoshi, but a cutscene (yes, a cutscene) plays, I was able to get the FMV file for it so here is what happens:
The Red Yoshi scaredly tells the Purple Yoshi that he was bruised on his eyes, he said "You and Brown Yoshi would have to both die to get unlock the other Yoshies, farewell!".
The game went to black after a stabbing noise was heard, it restarted like normal and played like normal, and nothing bad happened.