The episode continues right where it left off. With Ash's group and Serena's group now reaching the Kalos Gym Leaders + Diantha with Greninja, Pikachu, Metagross, Garchomp, and Charizard freed from the vines, it is now time for the real final showdown. Ash and Alain decide to run towards the core of the Megalith Zygarde, figuring out they need to get Mairin's Chespin out of there first. As they run toward it, the vines try to stop them, but they got Greninja, Pikachu, Charizard to stop them. However, there are a few moments where it becomes overwhelming for them, and this is where the Kalos Gym Leaders kick in. Each one helps Ash and Alain proceed by taking out a few vines with their signature Pokemon. The Gym Leaders get trapped by the vines in the process, but it is enough help to allow Ash and Alain to move forward.
In this entire moment, Viola and Grant work together to help Ash, but both get captured by the same vines in the process.
Man, the anime sure wants Viola x Grant to be a thing. Nothing against it though. We knew they had chemistry together since the Battle Chateau episode.
Malva and Sycamore also lend a hand as well, but the two also get captured in the process. Even Team Rocket lends a hand with helping our heroes, but one of the vines strikes down their helicopter. Luckily, Diantha commands her Mega Gardevoir to use Psychic to save them.
Ash and Alain are now directly in front of the Megalith Zygarde's core. A few more vines attack them, but Diantha and Steven save them. Both also don't get attacked by the vines as easily as the others, and they end up being the ones to stop any additional vines while Ash and Alain navigate their way through the inside of the Megalith to find Mairin's Chespin.
While inside the Megalith, Ash and Alain have to dodge several crystals that emerge at a fast speed every now and then. It isn't long before they finally reach the Chespin. Alain jumps toward it, with several crystals about to poke him from below. Just as he's about to grab Chespin, we change scenes to see what's going on with everyone else outside. Blaziken Mask took an injury earlier as he tried to stop the vines, but as he gets up, his mask comes off. It is there that Clemont and Bonnie learn that Blaziken Mask was actually Meyer, their father.
The vines ultimately stop, revealing that Alain has successfully grabbed Chespin from the Megalith. He and Ash meet up with Mairin, who was waiting with Serena and Clemont, and hand Chespin back to her.
To be honest, I'm glad it was Alain that saved Chespin. It gives proper closure to his story regarding how he was doing everything to save Mairin's Chespin, and it reinforces the fact that he is the other main hero of the XY&Z series, not just Ash.
But the battle is far from over. The Megalith Zygarde suddenly reactivates, and Lysandre emerges from behind. It's revealed that he used his Lysandre Machine to power it back up, thus allowing it to continue toward the Sundial. It is around this point we see that the walking area around it has melted off, adding to the gravity of the situation.
The Megalith Zygarde fires a giant red beam at everyone, but Valerie orders her Spirtzee to use Wide Guard to protect everyone. Despite the protection, everyone can still feel the force of the blast, almost getting blown away to be exact.
Everyone survives the beam and rushes toward the Megalith Zygarde. We now see Squishy and Z2 conversing with each other. Squishy tells Z2 that this is proof that humans are not necessarily foolish and destroyers of the world, but are in fact protectors. As it watches everyone rush toward the Megalith Zygarde, Z2 finally makes up its mind. It and Squishy call forth all of the Zygarde Cells from around the globe to join together. It is there we see Zygarde turn into its Complete Forme!
What follows is pretty awesome, one of the best moments in the entire anime to be exact, with another dark and satisfying moment at the end of the scene.
For those that want to know what's going on here, Lysandre tells the Complete Forme that it can never stop him, but we all now he is doomed at this point. He commands the Megalith to fire the same beam, but Zygarde counters it with Dragon Pulse, then manages to push the Megalith Zygarde back. Ash and Alain then order their Pokemon to attack Lysandre, causing Lysandre's machine to break off. Not going to lie, it was pretty satisfying to see Lysandre attacked like that.
Zygarde follows up with an Extreme Speed, blasting straight through the Megalith's core. Bonnie cheers it on, and she even manages to command it to use the final attack! We then see Zygarde using its signature move, Core Enforcer, on the Megalith. This attack destroys the Megalith and kills Lysandre. Yes,
Lysandre dies to Complete Zygarde's signature attack.
Let me sum up why this scene was awesome:
This cute little character...
managed to command this awesome legendary...
to kill this threatening character!
Just let that all sink in!
With Lysandre killed and the Megalith destroyed, Zygarde reverts back to its two cores. Marion's Chespin wakes up from its coma, causing Mairin to burst into tears of joy now that her main Pokemon has finally recovered and returned to normal.
After that, we have a pretty emotional scene: Squishy bidding Bonnie farewell by recounting all the happy times and thanking her for the time they spent together as it and Z2 float away to another location of Kalos.
Here's the scene for those want to watch it. Again, a tissue box might be needed (I didn't cry, but it still moved me; then again, I'm not that much of a cryer).
And with that the episode ends.