Monkey Ball is an ongoing series of action-adventure games published by Sega, new installments frequently being developed for a variety of consoles. Monkey Ball Touch & Roll, played on the Nintendo DS, contains 120 adventure mode levels and various others for the 6 minigames. However, looking at the files inside the game, it may seen odd that there are over 70 more level files than there should be. Most of these files appear to be levels ported from Monkey Ball and Monkey Ball 2 for gamecube. Among the minigame levels, 6 unused Survival maps and 7 unused Golf maps can be found, as seen below.
Article by Skelux