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I'm just throwing this out there because 99% of anons would have never tried it.
Ditto's Copy Anything can select attacks on benched Pokémon, which is one thing that makes it better than Genome Hacking. But of course, the reason Ditto is useless is because you have to mimic the specific energy cost to use the attack.
Just thought I'd bring this up because these crackheaded megas have such low energy costs, I'm sure you could cheese someone with an exorbitant amount of luck.