Here are some cheats and tips for the game Dr. Mario.
In-game reset:
Press Start + Select + A + B during
game play.
Bonus objects:
Play virus levels 5, 10, or 15 at medium or high speeds. Wait
at the intermission screen that features three viruses in a tree.
A bonus object will appear at the top of the screen. A different
object will appear depending on which level and speed is currently
being played.