NBA Live 2000 [N64]

Unlock Isiah Thomas
Get 15 steals at the superstar level and this will unlock him on your roster.

Unlock Michael Jordan
Play against Michael Jordan in a one on one bout. Once you've beaten him, he'll be unlocked in the Free Agents list.

Defeating Michael Jordan:
Defeat Michael Jordan one on one in superstar mode to unlock him on the roster.

Although the following trick can be done with any point total to win, 11 is probably the best. Choose Jeff Hornacek to play against Michael Jordan. After getting the ball, just shoot three-pointers. Michael will not guard you until your start to make a lot of shots or get a big lead. When he does start to guard, back up a few feet from the three point line and shoot the ball. He will not guard and you can still make the basket. Note: Make sure to release ball at the top of your jump. Jeff Hornacek will not always make it, so only shoot the three-pointer on every other shot. He should make about 90% if he shoots every other shot. Try to drive on every possession when you do not shoot a three.