Pros: Classic. Fun. 10's of Hours of gameplay.
Cons: Only cheap place to buy it is online.

Lately Nintendo has been putting some of their old Regular Nintendo games on the Gameboy Advanced. This is the one you should own! Worlds upon Worlds, Levels upon Levels, This game will keep you occupied for hours at a time, or minutes at a time. That is exactally what a gameboy is supposed to do.

You can play one or two players using only one system and only one game (unlike most games that require you to own two systems and two games) One player plays as Mario until he beats a level or dies, and then it is Luigi's turn. This is most likely the best mario game ever made on the Regular Nintendo, and those old outdated graphics that look all pixelated on the big screen, look stunning and beautiful on the small Gameboy Advanced (or DS) screen.

The bottom line, is I have never met someone who disliked this game, if you were to only own one game for your gameboy, I say let this be the one.