Because what happens next is a nearby tree exploding into splinters as a Tyrunt is thrown through it, taking out a large chunk of underbrush as it slides to a stop. It quickly hops to its feet and fires off Ancient Power in the direction it came from. The sound of more wood breaking is drowned out by a roar as a Charmeleon leaps through the gap where the tree was and lands in front of the Tyrunt. They're both still for a moment, breathing heavily. From their mutual exhaustion and countless minor wounds, it's likely that they've been at this for a while.
Their momentary break ends and they're at it again, clawing and biting at each other and destroying nearby foliage in the process, until with twin roars and a final charge they slam their foreheads into each other and start glowing. When the light fades, a Tyrantrum and a Charizard are staggering back from the collision. Domri calls out from the sidelines where he's been watching the fight.
"Are you two done now? You both evolved at the same time!"
The two Pokémon sit down heavily and glare at each other, but even with the burst of energy provided by evolution they're both too exhausted to continue right now. Domri looks over at you.
"Did you see that? Wasn't that wrecked!?"