With the new GX mechanic shaping up to be a lot like the old ex mechanic, (whereby the more powerful incarnations of pokemon are still generally evolved) it devolution will most definately be a strong mechanic. Back in the day, ancient technical rock was a pretty popular 1-of that had the exact same effect as Espeon’s miraculous shine attack. That being said Espeon-EX seems destined to become a powerful card with the drop of sun and moon sets, with uses in taking double ko’s to seal games whilst avoiding harsh N’s, as evolved GX’s pre-evolutions tend to be lacking in hp. Espeon-EX has a cheap, flexible attack which makes it highly splashable in a lot of decks.
~Thoughts? - Discuss
N.B. SolgaleoGX decks can auto-win greninja with this (provided wally is not played), as bubble can be countered by Ultra Road -> float stone.