You can put him on your wiimote. go to mii channel click on the wiimote icon hold b and a on your mii to drag him into the bubble. Then you can go to your friends house and play with your own mii.
I don't think so. However you can save your Mii's to your Wii Mote if you want. Just go to the mii channel and there should be an option to save them to your remote so when you're over at a friends house you can upload them to his/her Wii.
You can put him on your wiimote. go to mii channel click on the wiimote icon hold b and a on your mii to drag him into the bubble. Then you can go to your friends house and play with your own mii.
