Add option to hide all battle timer messages in chat.
First of all, note that most fights "don't speed up" because of the battle timer; people don't regularly spend 150s picking moves. However, typical exchanges with battle timer:
-person starts battle timer at beginning of fight, legitimately, just to get the most out of it. This however annoys the other player.
-person starts battle timer at beginning of fight just to annoy the other player.
-person starts battle timer at beginning of fight for unknown reason. The other person, annoyed, deliberately uses more time just to prove the point that battle timer doesn't speed up fights and for annoying the first player, creating an "annoy the other player" war.
-person wins game through bullsh*t hax. Just to rub it in, they start the battle timer to mock the other player.
-person starts battle timer. Person proceeds to take 45s to pick each move. The other player, who doesn't need the battle timer on, takes 10s to pick each move.
If you don't spend 150s picking moves, which virtually no one ever does, then there's no point in seeing the battle timer at all. You'd still be picking moves at the same pace and never timing out. Instead you have to deal with these stupid mindgames which do nothing but detract from the game, to play it.