While I do agree with most of your points on improving Unfezant, the ability "Courting" is basically displaying homosexuality. I know you already stated that you see the infatuation as "blinded by beauty and cuteness", but it will potentially create a large amount of controversy on whether or not the intention is to expose children (The main demographic of the Pokemon franchise) to homosexuality. I know it may not seem like a big deal, since it's just infatuation, not sexual intercourse. But the way I see it, Game Freak wouldn't risk damaging their brand to controversy, by having an unnecessary figment of "mature content" in the Pokemon games. If this idea was for Pokemon Reborn, then the developers might accept it, since the fan game is known to have
mature content, but then again, they could get sued by the Pokemon Company if the Unfezant's ability "somehow" damages their brand. Just a thought