Team Rocket Admin said:The new opening is confusing to the max. In some ways it works better for THE DUB, than the Japanese version. Chimecho & Mudkip are technically still here, but it also opens up spoiler city. The producers are up to something, though.
Maybe they're hinting at May getting pokemon that have been on the teams of other characters (i.e. Jame and Brock), just like she's obtained pokemon that Ash used to have... j/k.