You can decide, as in agree, with whoever you're battling with, what kind of battle system you use. But if you are roleplaying alone, as if on a mission or capturing a pokemon then you must roleplay it like the example below;

-Non-literate post-
"Torchic appeared from the brush.
I commanded poochyena o attack using tackle but torchic was too fast.
Torchic used ember and hit poochyena.
Poochyena used tackle again and this time it hit the torchic.
Torchic flinched and poochyena used tackle again.
I then used my pokeball, and it worked the first time!"

-Literate Post-
"Suddenly there was movement among the brush and I prepared myself for what would happen, poochyena by my side and ready to battle. What would have been a potentially dangerous pokemon turned out to be a pretty small torchic. Poochyena barked at the pokemon and I pointed at the torchic, 'You're going to be mine! Poochyena go!' Poochyena, at my command, leapt forward and growled, his ability to intimidate would only come when he became a mightyena. 'Use tackle, poochyena!' Torchic easily avoided the first attack and used its first attack, an ember that scorched poochyena's paws. This battle was unnerving and I prepared myself to lose it...etc."

PM all roleplaying posts where you capture a pokemon to either me or my vice captains and we will approve of the capture or decline it. Remember to keep in mind your pokemon, you experience, and the pokemon you battle. Both literate and non-literate posts are accepted, but remember everything above.