final fantasy mystic quest was pretty bad. does that count?
also, many view secret of evermore as a bad game (because they see it as a sequel to secret of mana), although i enjoyed it (and it was so hyped on Nintendo Power's Epic Center column)
bandai made some pretty bad games (although not as bad as some unmentionably bad psx games)
those movie-themed games were pretty bad, except i have guilty pleasure for some of the disney interactive games. uh, didnt someone make game for home alone? or was that NES...cant remmber. that old addams family side scroller was pretty bad too (i really liked it when i first played it in arcade somewhre, along with SMW).
also, if i remember correctly, sunsoft made some craptastic games although most were on the borderline of being mediocre and bad.
i didnt like taito's hagane
tecmo's secret of stars was pretty bad
uh what else
i never particularly liked soulblazer
street fighter alpha 2 wasnt a very good port
capcom stripped super buster brothers down to 1pl only
hey i think i can go on forever ^_^
rocketeer was kind of lacking (althouhg i'll let it pass because it was such an early title)
the games that came with miracle keyboard were really lacking (my 6th grade class had one). in fact all the pseudo-educational titles (i.e. mario's missing!) by software toolworks were pretty bad.
imagineers did a really sloppy port of sim city 2000 (as opposed to sim city with unforgettable mario statue)
x-band sucked...that wasnt a game tho
oh and last but not least, castlevania x. not so much because it was a bad game (it was one of the best games for SNES, with multiple paths and all), but it was just so...lacking. i remember reading on egm or something where they said konami was PORTING <- (bold letters) the TG16 rondo of blood for SNES, not stripping it down as much as they can, while leaving in one of the playable characters. well, it had a pretty decent soundtrack tho.
ok rest assure. i thinkk im done bitching about bad games now ;_)