Originally Posted by Spirit
Wait... by tweaking and using codes? you can get shaymin by using the walk anywhere code I believe.
"Tweaking" means moving in a certain way to confuse the game. In D/P, in Jubilife city, if you rode your bike rapidly in a specific pattern, the city and beyond would turn mostly just black (the "void") and you could walk wherever you wanted, being able to go to fullmoon island and flower paradise if you walker/biked there.