idk I'd have to have something to work with. You just said "idk", which really doesn't leave much to comment on. What I did was think to myself: "what makes a pokemon good in asb?" "how many of those things does [pokemon] have?" "what things would be mediocre on a normal mon but are great on [pokemon]?" further things to think about include: "what specific ability/move/type/stat synergies make [pokemon] a pain in the ass?" "what would I sub for against [pokemon?]" "how many of my mons can beat [pokemon], and why can't my other mons beat it?"