Early 2000’s cartoon kid movie (maybe 1990’s?)

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I can’t remember much but

The animation/drawings look close to the studio Laika

I believe the protagonist is a boy who travels with an older guy and some kind of dog like animal?

The world is like falling apart (I remember them stepping on rocks floating in the air to get to the other side)

My sister says she remembers they’re trying to save some kind of kingdom or something of the sort

Again, I can’t remember much but I’ve been searching for this movie everywhere and I can’t find it. I wish I remembered more but I don’t. Please help me find it

Nevena12 Answered question Jun 27, 2022
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Maybe “Dragon Hunters” 2008?
https://www.imdb.com/title/tt0944834/

Nevena12 Answered question Jun 27, 2022