>>58005908
I couldn't get it to make her an undead, but definitely an armored necromancer with a Duskull motif.

As for the prompt, my bad for not being clear - go on Gelbooru and search for "character (pokemon), full_body, official_art" (you need an account to search more than 2 tags but it's free), put all the tags in relating to their appearance - their hair color, hair length, eye color etc. If you want to put them in other clothes you omit any tags relating to their default outfit (bow, large bow in shauntal's case) and then put your own tags before the ones relating to the character.

So for this one it's:

pokemon, pokemon bw, solo, 1girl, Shauntal (pokemon), duskull (cosplay), alternate costume, armor, full armor, glowing eyes, necromancer, evil smile, purple armor, bodysuit, chainmail, gauntlets, holding weapon, bone whip, skull ornament, tooth necklace, tooth belt, cloak, black cloak, blunt bangs, bob cut, low-cut, purple hair, purple eyes, breastplate, dark background