MGM Park Hours-- May 2005
If you click on the individual day, they show the time for Fantasmic.
During the really busy times of the year, they run a second showing of Fantasmic. It looks like the only showing on May 25 is at 9:00 pm. There are second showings the next few days after that.
You'll probably want to get to the theater by 8:00 at the LATEST if you want a good seat for the show.