Is t true that Skandar voiced Dylan Kirrin from "Famous 5: On The Case"?

No he did not. If あなた want to find out all the things Skandar has done, check out him インターネット・ムービー・データベース（IMDb） page: link
This will 表示する あなた all the films that Skandar has taken part of. I hope this helps :)

Nope, don't think so.
Gosh, I remember that show. Horrible compared to the original 本 によって End Blyton.