press start and go to the button that says "SAVE"
You need to find and download an emulator then download a Pokemon xd ROM. most likely it wouldn't work
you need Winrar to extract it if your using dolphin emulator heres a link http://www.rarlab.com/
This may be stupid, but you can either transfer from your ds to dolphin, or transfer a rom prfl (profile) to the wii XD
There are multiple save slots but only 1 for each Memory Card.
Pokemon xd in my opinion