New episode title(s) has/have been added to the database. Title: 竹林の追跡！ヤンチャムとゴロンダ!! / Chikurin no tsuiseki! Yancham to Goronda!! / A Chase Through the Bamboo Grove! Yancham and Goronda!!. Please comment below!
Thanks, your friendly PM.Net AnimeBot!

Serena and Eureka fawn over how cute the Pokémon Yancham, which they've encountered in a forest, is. Little do they know that hell is just about to break loose...
Also, big 'Pokémon XY' news adorn the end of the year!

Summary:
As they continue their journey, Satoshi and friends stop for lunch... but then, two Pokémon named Yancham suddenly come out of the forest and eat all the food. As the group is perplexed at these proceedings, the Rocket Gang attacks! They capture all Satoshi and friends' Pokémon in one fell swoop, before running away!

The Rocket Gang pulled off their plan with great success. However, they end up having a petty fight, causing the balloon they're riding in to explode! Chaos ensues as they're all sent off in different directions, the stolen Pokémon included. Nyarth ends up crashing into a Goronda as he falls, which greatly enrages it, and...

Voice Cast:
Rica Matsumoto: Satoshi
Ikue Ohtani: Pikachu
Mayuki Makiguchi: Serena
Yuki Kaji: Citron
Mariya Ise: Eureka
Megumi Sato: Dedenne
Megumi Hayashibara: Musashi
Shinichiro Miki: Kojiro
Inuko Inuyama: Nyarth
Yuji Ueda: Sonansu
Yuka Terasaki: Yayakoma
Chinatsu Akasaki: Horubee
Hitomi Nabatame: Harimaron
Kenta Miyake: Maaiika
Unsho Ishizuka: Narration

"That Goronda sure chose something hard to get to put in its mouth." eh.... ok, here we go.
This episode features two kinds of Panda Pokemon. The duo of little panda Pokémon Yancham, who are somehow similiar in attitude to a spoiled Teddiursa. And the big boss Panda Goronda, who pretends to be cool only as long as it has a... bamboo... in its mouth.
A big part in this episode is played by Team Rocket, who, despite the fact that in BW they were always credited together as a team after achieving something, just argue with each other here like a trio of totally brainless idiots. Yay for the lack of consistency.

Another kick in the crotch that consistency receives in this episode is Citron's invention, which translates the speech of Pokemon. Seriously, world full of humans cooperating with Pokemon, noone except Nyaasu, N and maybe a few chosen ones being able to fully understand their speech and suddenly a kid invents a working translation machine? This invention could completely change lives of thousands of humans and Pokémon in the whole world. And I bet that despite that, noone will remember this invention in any of the following episodes, leaving the invention of the millenium forgotten inder a pile of pointless fillers.

Anyway, this episode is not a complete filler. After unsuccessful attempt of Team Rocket to catch a Yancham, they surprisingly meet a new Pokemon, which Musashi manages to capture.., Just by throwing a ball at it. It was obvious that Team Rocket is going to get a new Pokemon sooner or later, since Maaiika and Wobbuffet are not enough. And Team Rocket always gets at least two new Pokémon per person at the beginning of each generation. If only they would try to catch something more often and not just at the beginning. There are wild Pokémon everywhere, even those who are easy to catch. And if you can afford to create monstrous mechadroids, buying a few PokéBalls must b e a breeze. Right, Team Rocket?

In this episode we also see a completely new kind of background graphics, featuring a lot of bamboos. Finally a forest that doesn't look the same as all the other forests in the anime :)
And it now seems to be almost certain that all the battles are going to have a better animation than episodes before XY. At least the abstract backgrounds behind an attacking Pokémon were replaced with real backgrounds using the environment around the characters. So.. one more annoying thing about Pokémon anime has been eliminated.
And in this episode, there is quite an interesting animation used in the last scene where Satoshi runs for... a bamboo.

My rating:
All in all, this episode was quite enjoyable, despite being almost a filler (except for Musashi catching a pumpkin).
I give it 8.

TV Tokyo, XY Vol 2 Rental DVD and Amazon streaming all list Kiyotaka Furushima as Keromatsu in XY4. In XY12 and onward, Yūji Ueda is credited. It is unknown if there was a voice acting change or XY4 is just a miscredit that's never been fixed. Keromatsu's VA is therefore left unassigned for this episode.