[Poppy]

scarf gengar is a better check than most might think, scarf, let alone destiny bond is quite a rare sight. although, traditionally we don't rely on 'surprise' factor as a measure of effectiveness so i want more experienced members of QC to weigh in here; however, i am leaning towards mentioning this as a 'decent check, but if arceus doesn't attack you've most likely lost.'

bronzong can only toxic so just make sure you say that (i don't even know why you would mention it though, since forretress basically does the same thing)

i would actually put fighting arceus at number 6, with max special attack it has a good chance at OHKOing most extremekiller, whereas scarf dialga / heatran need substantial residual, omastar and kabutops need less residual but are rain reliant and omastar can only use hydro pump.