 A version of the game called Dr. Wario , which replaces Mario with Wario , is included as an unlockable minigame in WarioWare , Inc . : Mega Microgames ! . A simplified version of Dr. Mario also appears in Brain Age 2 : More Training in Minutes a Day ! as a minigame called " Virus Buster " , which is played by using the system 's touch screen to drag the capsules around the playing field . 
