Excellent episode for a finale.
A lot happened right in the begging of the episode. TR shows up, just about to ambush the group, and out pops Gible right in front of TRs. Those awkward moments were just awkward. ._.
Soon enough, Gible starts chomping away on the mecha and blasts off TR. Not in the team yet, Gible is already starting to keep up with old routine of blasting off TR.
Gible finally reaches the group, harasses Ash, then Jenny, and off he goes to who knows where. Then Jenny takes Ash and Co. to a nearby park where it looked like some land shark just took a bite out of everything.
Still acting naive, Gible shows up again, takes a bite on a bench, then Ash, and off he goes again. Ash follows up but Barry comes out at 30 mph and pulverizes Ash.
As both Ash and Barry talk it out, Gible helps himself to snack and eats Barrys bike. Yet another Bike destroyed but this time it was not by Pikachu. At least this was free of charge.
As Ash explained about Gible still being wild, Barry jumps into battle mode and launches out Empoleon for a battle against Gible, hoping to catch Gible. The battle ended quickly as Barry blasted off Gible to the distance. As Gible flew off, Ash and Co. went to go track him down, leaving Barry feeling proud with his battling skills but disappointed for taking out a strong Pokemon.
Soon enough, Ash finds Gible at the bottom of a cliff, wedge on a branch. As Ash tries to climb down to rescue Gible, the terrain breaks and Ash plummets to the earth but was quickly saved by a near miss as Gible reaches out to catch Ash. Moments later, they both scaled up the mountain and was safely back on solid ground.
TR then shows up again, only with a newly modeled mecha. They grabbed hold Gible, blasted the group with smokescreen, and fled the scene. Ash quickly catches up with TR by foot but TR was lucky enough to find a road block to jump across, hoping it will stop Ash. But brave as he is, Ash high gears it and and manages to catch some major air to jump across somewhat to be a canyon length cliff. He manages to get 3/4 across until he started dropping but was still able to latch himself to the other side of the cliff.
As Ash reaches the top, TR quickly grabs hold of Ash and Pikachu. Brock and Dawn finally caught up but was confronted by the road blocked. Brock was clever enough to find a bridge near by.... there's a word for this....
Ash quickly figures out a plan and orders Pikachu to Thunderbolt the mecha along with him and Gible, yet Gible wouldn't be effected. Ash was successful in breaking out and as TR gave it their last shot, it backfired and out TR blasted off.
A few moment later, Gible finally agreed to join the group, letting Ash catching him without a fight. Barry later shows up, ranting about Gible being his and then challenges Ash to a battle.
Battle between Ash and Barry was very well done. Nice technique to launch a Hydro Cannon to take out Gible out of the hole. Poor Piplup is still taking failed Draco Meteors hits. Something's telling me that this will be a thing for Piplup from now on. Extra kudos for Gible learning how to use Dragon Pulse. In the end Empoleon was victorious.
And this episode pretty much wraps things up from here.
There you have it. A short review for the final episode of the Galactic battle season.
Overall, I give it a 9.5/10.
Cue the Sinnoh League.