This is a guide on how to unlock every character in SSB64 with my terrible post-commentary! As if my normal commentary is any better!
Ultimate is found when you have unlocked all characters in the game. 77 fighters have come to the battlefield at launch, with more to come (see the full list here), but at the beginning you'll only have the eight originals from the N64 classic. To unlock all characters in Super Smash Bros.