So much of them… Actually, I'd said that at least 1/4 to 1/3 of my HUGE movie collection (by huge, I mean that the last time I counted them, there was around 300 and I've bought a good amount since then...) have less than 60% on "rotten tomatoes" and I still like every one of them. Amongst the worse ones are
-Mario Bros the movie
-the 2 Schumacher's Batman (I dunno why people don't like them... While it's true that they don't fit with Burton's more serious approach also used in TAS, they fit very well with the more campy interpretations like the old show with Adam West and the newest "Batman The Brave and the Bold" animated serie...)
-the 2 Mortal Kombat
-Ferngully
-Most of Disney's sequels (like Lion King 2 and 1 1/2, Return of Jafar, Mulan 2, Cinderella 2 and 3, ect)
-Grease 2
-Mystery Men
-Any X-Men movie that people don't like
-Twillight saga (Actually... I like them because it makes me laugh... and because the Volturis are "One-scene wonders" to me...)
-League of extraordinary gentlemen
-Scream 4 (Actually, it's my fav of the serie, I have no idea why...)I could write many others as well, but I think that's enough...
http://www.theonion.com/articles/harsh-light-of-morning-falls-on-onenight-stands-dv,1427/