...and only 2 Stuart Little movies, as well.
I think Final Fantasy only has 2, and although I've never seen them, I don't think they share main characters or plot.
I really should add to the rules that at least three of the films in the series must be theatrical releases. Sometimes, the first movie is popular, and then they come out with straight to DVD crap ripoffs, like with From Dusk Till Dawn.
Stuart Little did have a 3rd: Stuart Little 3: Call of the Wild...and it actually did air in theaters, rather than to DVD. I think you're right about Final Fantasy plotline not remaining constant. Addams Family did have a 3rd movie as well, but it came out straight to video.
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