Just reached Sunnyshore. Had a couple of recent changes to the Pokemon on my team, so I figured I'd train them by visiting the areas I'd unlocked but not been through yet: Iron Island and the cave near cycling road (I have visited it to get Gible but not been through the main area and defeated all the trainers yet).
Once done, gonna train at the route West of Sunnyshore until everyone's at least level 50.
Current team (various levels due to changes, average about 50):
Bronzong (Psychic/Steel)
Garchomp (Dragon/Ground)
Luxray (Electric)
Roselia (Grass/Poison)
Gyarados (Water/Flying)
Rapidash (Fire)
Really enjoyed the game so far! Once I beat Volkner I'm gonna retrace my steps through the region and grab any items/defeat any trainers I missed before moving onto Victory Road and the E4.