Gotta say the E4 and Champion gave me a good load of fun, the team I used includes;

Nacho Libre my sword dancing Incineroar

Notorious B.I.G my sweeping Gengar

Highway Star my status inflicting lookout Crobat

Moody Blues the hard hitting Crabominable

Slow Valkyrie the sleep talking tank who never dies also known as Mudsdale (Seriously this thing is AMAZING)

and last but not least Foo Fighters the Araquaid who was just all around really fun to use.

Honestly Sun was great fun and I loved pretty much most of it, now to just spend countless hours breeding and training all the other mons I want to use.