Step 1
Togekiss used Pluck! (-4 EN)
Crit (1, d8): 1 (Yes)
(6 + 3 + 3 + (8 - 5))*1.5 => 23
Togekiss plucked Sceptile's Enigma Berry! (+20 HP, -2 EN)
(Sceptile's Speed is 240)
Sceptile used Swords Dance + Leaf Blade! (-4 EN, -0 Tech)
Sceptile's Attack sharply rose! (+2 Atk, next 5 turns)
Crit (1, d8): 7 (No)
(9 + (6 - 7))*1 + (2 - 0)*4 = 16

Togekiss was hurt by the poison! (-4 HP)
Step 2
Sceptile used Iron Tail! (-3 EN)
Miss (No), Crit (1, d24): 12 (No)
(10 + (6 - 7))*1.5 + (2 - 0)*4 => 22
Togekiss used Air Slash! (-3 EN)
Miss (20, d20): 19 (No), Crit (1, d8): 1 (Yes), Flinch (No)
(8 + 3 + 3 + (9 - 6))*1.5 => 26

Togekiss was hurt by the poison! (-5 HP)
Step 3
Togekiss is glowing!
Sceptile used Iron Tail! (-3 EN)
Miss (No), Crit (1, d24): 3 (No)
(10 + (6 - 7))*1.5 + (2 - 0)*4 => 22
Togekiss fainted!
Round Summary

HP: +20-16-4-22-5-22 = -49

EN: -4-2-3 = -9

HP: -23-26 = -49

EN: -4-3-3 = -10