Battle Simulation:
Rossymore vs. Gigya
Arena: Testing Room
A fairly large padded room in the size of a square with one side dominated by a one way mirror allowing experiments to be viewed safely and dutifully.
Half of the floor is red, the other half is blue, allowing for simulated effects to occur.
In this instance, it brings up holographic representations of legendaries.
Loading Data from Legendary Pokemon Database. Please wait...
Data Retrieval Complete
Team Rossymore

Latios
Levitate
67/100 HP
70/100 EP
Team Gigya

Latias
Levitate
74/100 HP
73/100 EP
Ice Beam ~ Mist ball ~ Recover
The two Eon Pokemon continue the exchange of attacks that the previous legendaries began. Latias sends out a ray of white/blue light at Latios, just barely failing to freeze him. Latios, on the other hand, throws a pink block at Latias. Once it hits, a shield surrounds her. It seems Latias won't be able to heal for a while.
[Latios: -10 health; -5 energy ¦ Latias: -8 energy; Heal Blocked (5 turns)]
Now it's signature time! Latios and Latios Both begin to charge up energy, then instantly they release their attacks. Latios sends out an intensely bright beam of energy towards Latias, while latias Throws a ball that seemed to have been crafted with mist. Both attacks hit their marks. The two pokemon don't seem to be hurt much by the attacks, and they both seem to be equal in power, but they both manage to be hit with the side-effects, as well.
[Latios: -6 health; -4 energy; -1 Sp. Atk ¦ Latias: -6 health; -4 energy; -1 Sp. Def; H. Blocked 4 turns]
It seems that now is a nice time for healing, so that's what the Eon Pokemon attempt to do.
However, it seems latios' heal block is preventing Latias from healing, so only Latios gets the time to heal.
[Latios: +30 health; -20 energy ¦ Latias: H. Blocked 3 turns]
With the round over, the computers begin working once more, and the holograms disappear
Simulation Over.
Please Input New Testing Scenario.
Testing Mode: Randomize
Testing mode "Randomize" selected. Randomly Generating Legendary Matchup.
Please wait...
Pokemon Selected. Activating Hologram Devices.
The hologram devices light up once more, and Two pokemon take to the theoretical stage.
On the blue side, we have

Registeel, the Iron Golem
Randomly-Generated Ability: Clear Body (assuming it doesn't get rid of stat changes it already has?)
On the red side, we have

Uxie, the Lake Guardian of Knowledge
Randomly-Generated Ability: Levitate
As before, the two legendaries have the same injuries and conditions that the previous ones had.
¦ Post Round ¦
Team Rossymore

Registeel
Clear Body
87/100 HP
41/100 EP
-1 Sp. Atk
Team Gigya

Uxie
Levitate
54/100 HP
62/100 EP
-1 Sp. Def
Heal Blocked (3 turns)
Rossy to command next.
Ref notes:N/A