Got to saw this ep today here in Canada. Top three errors I have found in this episode are:

1) Arbok evolves into Seviper (already known by all)
2) May exclaimed she won the Fallarbor Contest with Skitty when it was BEAUTIFLY who won the Contest.
3) I found it strange that Bulbasaur's Razor Leaf was able to cancel out a Flareon's Flamethrower.

Other than those three idiotic things, this episode was preety good.

I'd give it a 7.2/10