I hope this will not be an wandering garbage that you can find in Internet when you don't know what to do and write "sfjpoifjefjeoifgh" or something similar.
Now I will start talking about an old game that appeared for first time for the japanese console gameboy advance... and it hasn't appeared for another.
I'm talking about the known game: Megaman Zero, (Rockman Zero in japanese), though I should say: "The Megaman Zero Saga", because it has 4 games for the previously mentioned console.
This game, launched by Capcom in 2002, got the highest selling number that year.
It has great critics and personally I think that it was very addictive when I played it at first time and I guess it continues being a funny game. A little while ago I was reading a magazine and this game was rated with 5 stars and classified as "The pilar of Megaman"
The main character of this game is Zero. In the X saga was a secondary character, but his charisma and arrogance made him a perfect character for head a new saga.
Here there is a post in Taringa (it's not mine), you can download it here: :http://www.taringa.net/posts/juegos/12267510/Megaman-Zero-1_2_3-y-4-gba-mf.html
Good Luck Playing :D