what is this movie title ?

[MyrnaR]

im looking for scooby doo the movie
where they go to a island they have a fight
and they find each other

on the same island

[veeringright]

Monsters unleashed was the second one but the first one was just called scooby doo.

Here is the trailer
http://www.imdb.com/video/screenplay/vi1485177113/

The Mystery Inc. gang have gone their separate ways and have been apart for two years, until they each receive an invitation to Spooky Island. Not knowing that the others have also been invited, they show up and discover an amusement park that affects young visitors in very strange ways. Fred, Daphne, Velma, Shaggy and Scooby soon realize that they cannot solve this mystery without help from each other