Keldeo is telepathic?! (quickly googles Keldeo) ah, in the movies.
I think I'd slightly adjust your plan so that Keldeo is trying to free the other Swords of Justice once they've been caught, maybe I can write in something to keep them busy so they can't just correct her.
I can work on the idea.
Keldeo growing her horn into a dildo, now that's something I can have fun with!
I'll probably make it so she can grow it out of her crotch and use it like a strap-on, Mew would definitely enjoy being sandwiched between two heroes!