Normally, you'd start at the bottom and work your way up. As Bust a Move 3000 is the first most emulators emulate, because the graphics are much simpiler then the other games. You wouldn't expect it to run Metroid Prime in the first release, would you?
Not all games are 3D though, games like Smash Brothers aren't much 3D. 3D means walk anywhere, basicly. A 3D enviroment, not a sidescroller.