And at some point after going monthly, they started putting out 13 issues a year. One for each month and then a holiday issue. There are also a handful of years (like this year for example) where they put out one bi-monthly issue at the start of the new year, which would put it exactly 12 issues for those years, assuming each year had a holiday issue when they started making those.
The games could have also been pulled from the short lived Game Boy Advance Power Magazine, or whatever the hell they called it. Didn't they also make a Game for Girls magazine for a month or two, or am I thinking of a different publication?