counter

Source: http://www.smogon.com/forums/threads/past-gens-research-thread.3506992/#post-5878612
- Counter misses if the opponent's last selected move's Base Power is 0.
- Counter misses if the opponent's last selected move's type is not Normal or Fighting, or if the move is Counter
- Counter misses if the last move used in the battle did no damage to its target.

Every particular case discussed below has been tested in the games as well (in a link battle).


Hitmonchan1 used Strength!
The foe's Hitmonchan2 lost 25% [76 HP] of its health!

The foe's Hitmonchan2 used Ice Punch!
Hitmonchan1 lost 61 HP! (20% of its health)

Start of turn 2
Player1 called Hitmonchan1 back!
Player1 sent out Tauros!

The foe's Hitmonchan2 used Counter!
Tauros lost 152 HP! (43% of its health)

Counter should've done 122 damage (61*2) because the last damage-dealing move used in battle was Ice Punch, which did 61 damage. Counter should've only dealt 152 damage (76*2) had Hitmonchan2 (Player2) moved first.

***********************************************************************

Start of turn 1
Hitmonchan1 used Strength!
The foe's Hitmonchan2 lost 26% of its health!

The foe's Hitmonchan2 used Counter!
Hitmonchan1 lost 158 HP! (52% of its health)

Start of turn 2
Player2 called Hitmonchan2 back!
Player2 sent out Lapras!

Hitmonchan1 used Counter!
The foe's Lapras lost 68% of its health!

Hitmonchan1's Counter should've missed because Hitmonchan2's last move selected was Counter.

***********************************************************************


Start of turn 1
Hitmonchan1 used Strength!
The foe's Hitmonchan2 lost 23% of its health!

The foe's Hitmonchan2 used Counter!
Hitmonchan1 lost 144 HP! (47% of its health)

Start of turn 2
Player1_ called Hitmonchan1 back!
Player1_ sent out Lapras!

The foe's Hitmonchan2 used Counter!
Lapras lost 144 HP! (31% of its health)

Hitmonchan2's second Counter should've dealt 288 damage because the last damage-dealing move used in battle, its own previous Counter, did 144 damage.