Even tho intimidate is not working, I think it would be convenient that it triggered a message saying that it lowered the opponent`s attack (same mechanics as when Ttar comes into play and the sandstorm message is broadcast). Reason why is quite simple, for pokes such as arcanine, not knowing what hability it has is quite a disadvantage. If the message was shown we would know that it has indeed intimidate, and thus we could WoW, or use fire attacks on it in case we dont have anything more convenient to hit it with. As it is now, there is no way of knowing if it has FF, and we risk wasting a turn trying to hit it with fire.