Well Kricketune is gonna be useless from now on, so I recommend ditching him for anything else, but your team is really solid. You may want a grass type or something besides marshtomp because your team has 3 pokemon weak to rock types. Probably not a big issue though. Also you can switch your Numel for a Growlithe after doing a sidequest in the Beryl ward. It's better than Numel in most ways, including the fact that it is way faster.