Mechanics Error BattleServer-wise When did you first notice the bug?: today Have you been able to reproduce the bug?: yes Information (include relevant logs, replays, screenshots): Prism Armor now does not reduce damage from super-effective attack. tested with self battle on our sim: http://imgur.com/a/TcrBQ this corresponds to 0 SpA Gengar-Mega Shadow Ball vs. 252 HP / 252 SpD Necrozma: 236-278 (59.2 - 69.8%) -- guaranteed 2HKO But with Prism Armor it should be 0 SpA Gengar-Mega Shadow Ball vs. 252 HP / 252 SpD Prism Armor Necrozma: 177-208 (44.4 - 52.2%) -- 17.6% chance to 2HKO (If applicable) Sources to confirm the presence of a bug (ex. Smogon): Bulbapedia