Actually they never untransformed the entire week before the cellgames ^^No, Super Saiyan 2 is what Gohan became DURING the Cell Games, which allowed him to topple Cell, and overpower him in the middle.
Goku achieved and utilized "Ultra Super Saiyan", the supposed level of power he, Vegeta and Trunks all attained in the Time Chamber. Technically Goku was at "SS Full Power", owing to how he trained his body to become used to the Super Saiyan state without tiring out, something he and Gohan achieved by remaining in the Super Saiyan state for an entire day.
Brolly isn't canon ;pIt was discussed here (the comments):
http://www.dragonball-multiverse.com/en/page-176.html.
Actually i see no proof in there, only speculation.Who talks about Broly? I was pointing to the comments about Goku and Gohan sleeping in SSJ forms. And those comments are about the canon thing, not about DBM manga.
Upload the scan. Why would anyone add "except while we sleep" if it wasn't written originally?It mentions nothing of the sort in the official viz translation.