Granted the last time I saw it was in 1999 when the movie came out. It was a fun night since all the fans crowded the theater, and we all got a special pokemon card just for watching the movie.
While it still has a very kid-friendly story, the movie was a bit darker than the anime.
Like making Mewtwo pretty menacing. The big gimmick of the movie was Mew vs Mewtwo. Also worth noting is that Mew was not originally made available in the U.S. versions of the game instead you either had to use a Gameshark or wait for a store-Pokemon event where they were giving them out.
But it turns out that it was tie. I hate when versus movies do that.