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NOTE: I lost my original draft due to inactivity, so that means that the first round will be re-rolled. There were no instances of "hax" before; let's see if that changes.
A1
Archeops used Focus Blast. (-8 en)
Hit: 7982 yes
Crit: 6558 no
Effect: 2646 no
Damage: (12 + 6 - 4.5) X 1.5 = - 20.25 HP
Tyrantrum used Ice Fang. (-5 en)
Crit: 1114 no
Effect: N/A / 1842 no
Damage: (7 + 3 + 7.5 - 4.5) X 1.5 = - 19.5 HP
A2
Tyrantrum used Protect. (-7 en)
Tyrantrum is protecting itself.
Archeops used Focus Blast. (-12 en)
Hit: yes
Crit: N/A
Effect: N/A
Damage: (12 + 6 - 4.5) X 1.5 = - 20.25 HP
Tyrantrum protected itself (-8.1 en).
A3
Archeops used Earth Power. (-7 en)
Crit: 3486 no
Effect: 3959 no
Damage: (8 + 6 - 4.5) X 1.5 = - 14.25 HP
Tyrantrum used Dragon Tail. (-4 en)
Hit: 3266 yes
Crit: 4152 no
Effect: N/A
Damage: (6 + 3 + 7.5 - 4.5) = - 12 HP
Archeops was switched out (2/2 [Mega-Salamence-T]).
Mega-Salamence-T was dragged out!
Toon's post inspired me to double-check the NDA's description of Jaw Fossil, and, when I did so, I learned that I had been using an outdated version of the item throughout this battle. This is a notable gaff, as the accuracy boost granted by Jaw Fossil means that Tyrantrum's second Head Smash, from two rounds back, now hits Archeops. Please reorder at your conveniences, and I would like to apologize again for the error.
If Endure, and Salamence is not behind a Substitute, and Salamence is not poisoned, use Toxic that action. Only do this once. Push back actions.
If damaging Dragon-type combination, use Protect that action. Only do this once. Push back actions.
If Roost when you would use Rock Slide, use Ice Fang that action. Push back actions.