This is one of the episodes that I will ceratinly love for a while. The whole evil and possesed Satoshi is a great relief for me, as I thought it will never happen, in this arc anyway. I agree that the voice was a little heavy, but other than that, I liked it. YamiSatoshi ordering Junkai to hide behind the referee as a shield was a pivotal and hilarious moment for me. I hope after the GF, that the real battle with Jindai will be epic, as it is the last of the Frontier Brains and all.
The only letdown that I felt was everyone seeign Ho-oh. That ticked me off. I grew up with the sentiment, that Ho-oh is like a meaningful symbolism that bonds with Satoshi's journey, and Satoshi himself. A remembreance of how it all started, how he got Pikachu to like him, etc. Even in later episodes it was like a pokemon that Satoshi could only see, that he's made for greatness, especially in Johto when it said along the lines that Ho-oh only shows itself to worthy trainers. It contributed to Satohsi's dream. This episode blew that away, and now Ho-oh, at least to me, doesn't feel special at all anymore. Just another legendary.
Oh well.