there was a sequel planned for the N64 (in fact the game was made, but never released) called "mothersomething", but nintendo was forced to kill the N64 a year before scheduled ( yay) and the game was said to come out for the Dolphin, like dinosaur planet. at the end, dinosaur planet was mixed with star fox, and earthbound never came out... i think
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"When Gotham is ashes, you have my permission to die." -BANE
They made earthbound for regular NES also, I think it was called Earthbound Zero (or something like that). The SNES one I still sometimes find myself playing again.
I remember that game i had to give away my snes so i even went to download it on my cpu it's one of my all time favorites. It is way up there with zelda in my opinion
perhaps they will make a Mother (EarthBound) sequel for the next nintendo console. Ive never played it, the closest I've been to it is smash brothers lol (Ness)