This page contains Dr Mario Hints for NES called "Bonus objects" and has been posted or updated on Sep 3, 2006 by TheUnknown1. Let us know what you think of this Hint by thumbs voting.
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.
After completing level 20 on medium or high speed, an object will fly above the little viruses on the tree.
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