Partly about Drapion and Toxic Spikes, yes, mostly about Infernape going batshit insane and knocking out Electivire. And the Dragonite battle was definitely good, it had so many moves to make it seem unstoppable. Another Dragonite has recently been introduced to the anime that has a similar thing going for it.

There's also another awesome battle that was recently in the anime, but it hasn't been dubbed yet, so I can't say anything. Drat.