How many sonic movies are there

One, Sonic the Hedgehog the Movie. Shortened, it's Sonic the Movie.
1 and only 1, by the way the movie WAS going to be rated R because of some "Naughty" scenes. such as, sonic pointing the middle finger at Eggman ( i laughed when i herd this!) and tails getting his hands on a girl's... you get it. of course America cutted all the Naughty scenes out.
Some one elses answer: there are a few sonic movies. one is the movie below. there is a movie made for sonic's 15th birthday and it's called "Sonic Nazo unlished" ( you can see it in www.youtube.com). there is a short film too and is called "Sonic and the wherehog night"(I'm not shure how to spell werehog or wherehog!) you can watch this in youtube too.
If you want sonic cartoon episodes, there are some too: 1) sonic x. I am sure you know this one. (if you are German than you're in luck!) 2)sonic underground. it a little different to the sonic we know. I think you know it but let me tell you about it. in this cartoon sonic has a brother called Manic (or Menic i don't know) and a sister called sonia and they ..... (see it your self in youtube) 3)The adventures of sonic the hedgehog. in this one sonic is with tails. 4)This one is called "Sonic the hedgehog". This one is a little like Sonic underground but sonic doesn't have any brother or sister. There are other friends and enemies (Dr. Eggman or like they call him, robotnic, is still the main enemy).
Have fun watching them all. It's going to take a few years!