Step 1:

Raikou used Thunderbolt! (-7 EN)
Crit (1, d24): 24 (No crit)
(9*1 + 3 + 0 + (8 - 8) + 0)*1 + (0 - 0)*4 + 0 = 12 (Substitute HP: 5 - 12 = -7)

Mimikyu's Decoy faded!

Mimikyu used Swords Dance! (-7 EN)

Mimikyu's Attack rose! (+2 Atk)
Step 2:

Raikou used Thunderbolt! (-7 EN)
Crit (1, d24): 8 (No crit), Paralysis (1, d10): 9 (No paralysis)
(9*1 + 3 + 0 + (8 - 8) + 0)*1 + (0 - 0)*4 + 0 = 12

Mimikyu used Swords Dance! (-7 EN)

Mimikyu's Attack rose! (+4 Atk)
Step 3:

Raikou used Thunderbolt! (-7 EN)
Crit (1, d24): 14 (No crit), Paralysis (1, d10): 7 (No paralysis)
(9*1 + 3 + 0 + (8 - 8) + 0)*1 + (0 - 0)*4 + 0 = 12

Mimikyu used Pain Split! (-22 EN)

Raikou was hurt! (-19 HP)

Mimikyu recovered HP! (+19 HP)
Round Summary

Mimikyu HP: -12-12+19 = -5

Mimikyu EN: -7-7-22 = -36

Raikou HP: -19

Raikou EN: -7-7-7 = -21