Mother, or Earthbound as it is known in the US is a fairly successful series in Japan. It's an RPG which takes place in a fairly modern setting where the main characters use baseball bats and everyday items to attack. Only Earthbound (number 2 in the Mother series) ever made it in English. I've finished Earthbound but I didn't really think too much of it frankly. Games like Breath of Fire, Persona and Final Fantasy appeal to me more I guess.
Anyway, Mother 3 was released on the Gameboy Advance and the English fan translation was recently completed. I've played about the first hour of the game and I still don't understand why everyone thinks its great. Perhaps its charm lies in the almost serene clear nature of the game, the eco-friendly themes, the simple graphics that harken back to a more innocent time along with the concepts of a warm loving nuclear family. Who knows? I prefer games like Shin Megami Tensei with its serious dark tones and philosophical underpinnings.
Anyway, go check out the translation patch here.