The graphics are bad (because it was originally for the N64 in Japan only),
You can use a code system to get any item you want from Tom Nook,
Weeds grow uncontrollably,
The world is cut into Acres and you have to scroll through every screen,
You can get some NES Console games,
Instead of a Flag on your house when you beat the game, you get a Gold Statue of yourself,
There's a Train instead of a Bus,
The house debt costs more,
The basement is the largest house in the game,
You can hook up your Gameboy Advanced and go to a deserted Island from Kapp'n the Sailor( the dock at the ocean),
You get your own personal Gyroid in the front of your house where you can store things and set a message,
NO ONLINE CAPABILITY.
I can't remeber anymore things, xD that's what i remember from it.