This episodes it's not just a perfect way to kick off the season, but a great example of how smart the show writers are. Any other show will replace its voice actors and do like nothing happened, but Gumball is smarter than that, and they made an episode making fun of the puberty and voice change. The episode had many great jokes too, like the bus scene, and one of the show's best songs. I love when Gumball gets weird or ironic, but there's something so magical about taking a simple concept that everyone can relate to and taking it to a hilarious extreme. Also, it's remarkable the improvement in animation quality from last season to this one.
10/10.
10/10.