I'll just copy/paste what I posted about this episode from another forum:
Previously in Pokemon:
A BATTLE TO THE DEATH (not really) between two big time legendary Pokemon, which are almost never featured in the anime. AND the Darkrai movie gets a continuity reference with Dawn mentioning that item she has. Oh, and Darkrai appearing (though not the same as in the movie). AND an evolution happened.
That episode sucked.
NOW pretty much a filler episode. No real big battle. No evolution. TR don't even "blast off."
So why was this episode, featuring a Pokemon more annoying than scary or useful, was so much better?
It was hilarious. This episode was full of scenes that need to be screen capped and turned into GIFs. If nothing big is going to happen. at least make it entertaining. And that's what this episode was.