1) Through song an orphan learns to build up his life and then completely destroy it
2) After what appears to be a gut-wrenching betrayal, revenge is taken on a former friend with the power of deceit and pancakes
3) Teens spend their time on an island where killing is okay but littering is not
4) A group of people do their best to protect a girl from an evil Winnie the Pooh who wants to marry her (although he's kind of already dead...)
5) After enduring hours of bear puns, everyone begins to question if saving lives is really worth it
6) A snake fights a cat. This cat later helps another snake to fight a different snake (who both came from the first snake). At some point there was also another snake who thought he was the first snake.
There's giant metal bipedal weapons too
7) A human lives in harmony with many different types of animals until one day they decide to stay in their house. Weeds grow, their hair becomes a mess and everyone blames them for what has happened in their absence
8) Finding Nemo... But it's with humans instead of fish (and the son is now older than the parent...)