<Li> Sam Greco as Zarkos </Li> <Li> Steven Grieves as N'Goo Tuana </Li> <Ul> <Li> Neil Fanning as the voice of Scooby - Doo </Li> <Li> Scott Innes as the voice of Scrappy - Doo </Li> <Li> J.P. Manoux as the voice of Scrappy Rex </Li> <Li> Jess Harnell and Frank Welker as the voice of creatures </Li> </Ul> <Li> Neil Fanning as the voice of Scooby - Doo </Li>

Who does scooby doo's voice in the movie