I am looking for the title of a movie from the 90's where a boy travels through some type of portal to another world and there are weird kangaroo/fox looking creatures (who can talk of course) who need his help for some battle.

Possibly Warriors of Virtue (1997) (http://www.imdb.com/title/tt0120479/)

YES! That is exactly the movie that I have been trying to remember for so long! Thank you so much!

You're welcome.