It was well done. Even though there was some stock footage used for Roselia from previous episodes (and some for Beautifly), the battles were animated very well, and the Pokemon really used some interesting tactics. Using ice to reflect a Solar Beam is pure genius.
The only thing I thought was unfair was how May still gets qualified for the finals even though Jessie cheated. Even moreso, the kid who recieved the 25.8 didn't even get to replace Jessie, so whoever he/she was had potential, but now they'll never know. I guess it doesn't matter in a cartoon, but if that happened to me in real life, that would be extremely unfair. If they didn't let me back in, I'd probably do something rash and set fire to something... I dunno. Or I'd like to, but I know I wouldn't.