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Raichu isn't a very common Pokemon but the way you're using it is pretty unique. I don't reccomend assault vest however.
252 SpA Tera-Ghost Calyrex-Shadow Rider Astral Barrage vs. 132 HP / 158 SpD Assault Vest Raichu-Alola: 156-188 (102.6 - 123.6%) -- guaranteed OHKO
Replace the assault vest for...
ADD REMOVE HIGHLIGHT COMMENT
(RC) = remove comma (AC) = add comma
AMGP, implement if you like, and if an actual GPer can give me feedback on this I'd highly appreciate it.