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Yes, he should have reflected a3 instead. That was a legal chance clause, so his orders became Gyro Ball-Reflect (couldn't use due to flinch)-Reflect (changed from gyro ball by chance sub).
Also, I broke his substitute on a1, and he did not put one later.
Besides, your math was off. Even if the chance sub was somehow illegal, therefore preventing its activation and making Honedge use Gyro Ball a3, Larvitar would be at 33 HP, not 32.
Damage and Energy consumption are both treated with the same rounding rules in ASB. Neither are rounded as soon as an attack is completed. At the end of the round, Damage and Energy are each summed, and the final result of these is then rounded normally (ie ≥.5 rounds up, <.5 rounds down). It is important to note that it is the damage and energy consumption which are rounded, not the remaining HP and Energy (so in the case of an even .5, the remaining HP and Energy will go with the lower of the two values!) An important exception is that if a Pokemon is left at the end of an attack with .5 HP or less, they faint instantly instead of waiting until the end of the round to round to 0 HP.
New everything this round! New Pokemon, new format, and new referee for the battle! As I was saying, Dancer the Torchic comes out to avenge the fallen Honedge, its teammate. Yet, despite her dancing, it came out only to be hit be a blast of energy from its jackal opponent. She counters with a fiery charge at the Riolu, knocking it back and gaining momentum, which she follows up with a powerful swipe from the shadows. Riolu retaliates by slamming his palm into the Torchic, who, still flaming and running around, rams into Riolu, before being knocked back with an enormous ball of energy. Riolu seems to have made up for lost ground with his powerful Focus Blasts, but will the extra speed of Torchic be enough to win this?
By the way, I've only got a phone to battle / ref with, so don't expect to have much flavour.
Well I'm dumb. I will take my reorder. kenneth1221 may reorder if he wants to. If he does not, my orders shall be as follows:
Force Palm-Vacuum Wave-Force Palm