Yeah I realised sleep powder or any grass type sleep moves are IMMUNE to other grass types yet iirc you can use toxic on a poison type.
Some things that I don't understand though -
• If I have a 200-250 speed Pokemon vs 100-250 and I always move first, then suddenly they attack first and kill me ? Despite having no priority moves (e.g. Shadow sneak) , no item boosts or abilities and no status and stat changes to both parties. I've been sniped by this loads of times..
Am I missing something or can showdown be fucked up?