Realm and Ladder characters: No way. Hell may have frozen over, but this is still impossible.
SP: Obviously, but SP characters are also your Open Battle.net characters (Select your Gateway beneath the Battle.net button on the main menu, then Other Multiplayer > Open Battle.net).
Other methods (TCP/IP, IPX etc.) also utilises your SP characters.
Edit: And once again ShadowHM has beaten me to it :) Good on yer.
SP: Obviously, but SP characters are also your Open Battle.net characters (Select your Gateway beneath the Battle.net button on the main menu, then Other Multiplayer > Open Battle.net).
Other methods (TCP/IP, IPX etc.) also utilises your SP characters.
Edit: And once again ShadowHM has beaten me to it :) Good on yer.
When in mortal danger,
When beset by doubt,
Run in little circles,
Wave your arms and shout.
BattleTag: Schrau#2386
When beset by doubt,
Run in little circles,
Wave your arms and shout.
BattleTag: Schrau#2386