A few years ago I saw an episode of a TV series in YouTube in which two girls of 12 or 13 years and a little boy came into a world of 2D animation, a forest, especifically. In that world they were skunks and one of the girls let out much odorous gas and she was ashamed of it. The three meet a fox and helped him. Some evil dogs attacked them and cornered. At the end they were saved because the girl who let out much gas used it against dogs. After that they returned to their real world and were transformed again into humans. The animation style was similar to the Warner Bros/Looney Tunes characters (anthro animals like Bugs Bunny, Animaniacs, Fifi la fume, etc.) and they spoke in english, so most likely it’s an american series. The video in youtube was removed shortly after I saw it for copyright infringement. I dont remember in what year I saw it, but It was before 2010, and the series should be of the 2000s. I’m not sure but maybe the mix of live action and animation only happened in that episode. Perhaps in every episode the children entered in the world of some TV series or something like that, but I just saw that episode so I dont know.