Today I defeated Team Plasma at Dragonspiral Tower and at the Relic Tower. Then I continued on my journey to go and get the final Gym Badge. I defeated Bianca on my way to Opelucid City, and after getting there I defeated Drayden and earned the Legend Badge. After that, I saved on Route 10, one of the final Routes before the Elite Four! My team right now:
Phil / Lv55 / Tail Glow, Baton Pass, Brick Break, Hidden Power (Flying)
Claire / Lv55 / Bug Buzz, Thunderbolt, Shadow Ball, Hidden Power (Ground)
EDIT: I just finished! Since my last update I finished Route 10, went through the Badge Checkpoint, then completed Victory Road. I did all of the endgame events after defeating the Elite 4, first defeating N then defeating Ghestis. After the credits I began grinding the team to level 100 for the Elite 4 and Champion. After what seemed like forever of grinding, I finally challenged the Elite 4 again and then defeated Alder, becoming Champion of the Unova Region! The final team:
Phil / Lv100 / Tail Glow, Baton Pass, Brick Break, Hidden Power (Flying)
Claire / Lv100 / Bug Buzz, Thunderbolt, Shadow Ball, Hidden Power (Ground)