It's easier when playing DS games to use a Keyboard + Mouse combination than a Controller + Mouse combination.
In fact Keyboard + Mouse can even prove preferable to using an actual DS with stylus in some games, at least that's been my experience.
Cheap: Air Hogs Flight Simulator controller (A PS1 controller without rumble. Nice and light. $10 with "simulator".)
My choice: Logitech Dual Action USB (a PS2 controller without vibration motors, essentially. $30 if you find it at the right place.)
Best: PS3 controller with the right adapter (USB on one end, USB type A on the other. $??)
Also, could you please include what console? A PS1 controller would be useless for a N64 game.