Opi has a flashme guide here http://gbatemp.net/index.php?showtopic=33481
I flashed with the non-stealth file in the link and it still has bright control.
100% approval from me being what you are looking for
Question though, does it normally default to bightest when plugged in?
if ya have a ds-phat >/= v.5 brightness will work like on a ds-lite. it doesn't have anything to do with flashme-stealth or normal flashme - it just depends on what firmware your ds-phat has.
Rumiko Takahashi got so much fan email about the character that she brought her back in the manga, it was going to be completely different originally (with the alien of the week type).