Summary: I haven't really been that up-to-date with the Super Monkey Ball franchise, since the only other two games I have of the series are Super Monkey Ball 2 and Super Monkey Ball Jr. Both of which I did not really play too much.
Summary: BUYER BEWARE! You cannot delete pre-existing data from the cartridge, so if you buy a used copy there is NO WAY to delete the data. I searched all over the web and its unanimous that you cannot delete the data.