Methinks I'm-a try my hand at this reffing schtick. WARNING: may contain RNG shenanigans!

INTENSE DESERT
The sun is high in the sky, and there's sand for miles.
Current effects: Gravity
~~~
KEY
? = Critical hit
! = Super effective
... = Not very effective; no effect

~~~
{AncientPower: crit roll 7331 (no), effect roll 86 (no); Extrasensory: crit roll 3935 (no), effect roll 60 (no)}
Due to Entei's slight speed advantage, he's off first. He inhales deep, and fires off a strange beam directed right at Lavados' brain. Rude. The flaming phoenix, with a miraculous amount of strength, somehow pulls some gigantic multicolored rocks out of the sand (Chaos Emeralds, much?) and shoves them all down Entei's face, dealing some super-effective damage. And is that the gravity inching back to normal?
{Lavados: -8HP, -16EP; Entei: -12HP!, -8EP; Gravity for 1 more turn}

{Swift: crit roll 1782 (no); Stomp: crit roll 1500 (no), effect roll 82 (no)}
The fire lion...dog...thingy then gallops over to the flaming notAngry Bird, literally putting his foot down as revenge for that Multicolored Rock Shooter gig of hers - obviously boosted by his 120% Attack stat, even! Lav just simply throws some literal stars his way, which also do decent damage.

Lavados suddenly feels all that excess gravity go bye-bye, and she can soar into the sky again. Doesn't change Pressure's effects one bit, though.
{Lavados: -8HP, -10EP; Entei: -6HP, -8EP; No more Gravity}

{Sky Drop: first part; Earthquake: WHAT?! (Punches Trainer 2)}
Entei then tries to give the earth a bad case of seismographic sickness...but can't. What the HECK, Trainer?! Anyway, Lavados takes this sweet opportunity to snag the derpy old fire beast and take him up to the sky. Ooh.
{Lavados: -10EP, ready to attack; Entei: nope.avi}
~~~
Notes
- Entei didn't do a thing on action 3, as it can't learn Earthquake at all.
- Pressure doubles the opposing Pokémon's EP usage. That's why Lavados' EP usage values seem a little R'Duckulus at first.

With that, comments and criticism are appreciated.