Recently I just went on a Metronome Battle streak, and then this guy came in with two shiny Volcanion with the following abilities:
• Lightning Rod
• Magic Bounce
I don't know how that's possible, is it because Metronome Battles allow AAA (Almost Any Ability) or what? I've been playing Metronome Battles for quite a while, and I haven't seen a single user using a Lighting Rod or Magic Bounce Volcanion.
Here's the link to the battle, for your reference:
As you can see, at Turn 3, the first Volcanion responded to Shock Wave with the Lightning Rod ability, and in Turn 5, Growl was countered with the Magic Bounce ability.