Flushed Away

At first I thought this was just another low budget animated movie. But after I watched I was really amazed. It was so nice and funny that I was really please I watched it. It's about a city rat that was accidentally thrown into a real rat city. After being alone for a really long time he meet many new friends and a love.
They adventured together and saved the rat city from being destroyed by a evil toad.
Funny one.