hacks or homebrew
You download Textu hacks
hacks or homebrew or something like that that's what i saw usually
There is a method to load custom SSBB hacks off your SD card through the stage builder. I'm not entirely familiar with the process, however you can find more information here: http://brawlplus.net/install-guide/
Through hacking. You can find the files needed for these hacks at the related link.
No, the only way you could is with hacks. Same goes with Melee and 64.
You need to use badder hacks
It is not possible to play as a alloy in the game if you do not use the homebrew channel, they are not playable characters.
No, you cannot play as any boss from Brawl.Don't be fooled by those who claim that there are cheats/hacks to play as them.
Sonic is in SSBB.
You can't get tails in SSBB.
rosalina is not a character in ssbb