A Taiwan guy has dumped the game data from the SSBB DL disc.
He uses the Wiikey DVD dumper on the Wii with D2Ckey to dump the game data in the 2nd layer of the D9 DVD, using a 2G sd card as a storage.
The data can be burned on normal D5 disc, and can be recognised by both D2Ckey and Wiikey Wii...