This can also start you at a certain location too.
Hopefully works in all Hoenn Games
Video - youtube.com/watch?v=Jmk4-h7ROcY
(using A-map 1.92, and XSE 1.1.1)
Here's an example that would bring you in front of professor birch in his lab
warpmuted 0x1 0x4 0xFF 0x6 0x5
All numbers in Hex