>>445222680 Atk Jirachi Iron Head vs. 0 HP / 0 Def Mew: 87-103 (25.5 - 30.2%) -- guaranteed 4HKO
0 SpA Jirachi Flash Cannon vs. 0 HP / 0 SpD Mew: 87-103 (25.5 - 30.2%) -- guaranteed 4HKO
0 Atk Jirachi Iron Head vs. 0 HP / 0 Def Deoxys-Defense: 58-69 (24 - 28.6%) -- 95.8% chance to 4HKO
0 SpA Jirachi Flash Cannon vs. 0 HP / 0 SpD Deoxys-Defense: 58-69 (24 - 28.6%) -- 95.8% chance to 4HKO
Its not technically the same, but its close enough for what that anon is saying to make sense. These calcs are run with an uninvested jirachi (same atk and spa, using moves of equal base power) vs uninvested mew and deoxys d. Deoxys d takes only marginally less damage.
