Step 1
Darmanitan used Punch Full of Bricks*! (-20 EN)
*this is probably illegal
(8 + (14 - 5) + 2)*1.5 => 29
Darmanitan's Attack rose! (+1 Atk, next 2 turns)
Rampardos used Rock Slide! (-6 EN)
Miss (10, d10): 10 (Yes)
But it missed...
Step 2
Darmanitan used Earthquake! (-7 EN)
Crit (1, d24): 1 (Yes)
(10 + 3 + (14 - 5) + 2)*1.5 + (1 - 0)*4 = 40
Rampardos used Rock Slide! (-6 EN)
Miss (10, d10): 9 (No), Crit (1, d24): 10 (No), Flinch (No)
(8 + 3 + (18 - 4))*1.5 = 38
Step 3
Darmanitan used Earthquake! (-7 EN)
Crit (1, d24): 1 (Yes)
(10 + 3 + (14 - 5) + 3)*1.5 + (1 - 0)*4 => 42
Rampardos
fainted!
(Reminder: Darmanitan's Attack stage returns to normal.)
Darmanitan was buffeted by the sandstorm! (-2 HP)
Round Summary
Darmanitan HP: -38-2 = -40
Darmanitan EN: -20-7-7 = -34
Rampardos HP: -29-40-42 = -111
Rampardos EN: -6-6 = -12