If it's Player Vs Player, it's play by play. If it's against an NPC, you just write a wall about it. (Though I'll probably control NPC's for the most part, mostly ones with Shadow Pokemon, and a few people I have in store for later.)
RP battling is more like the anime, creative at times. In the games you couldn't have a Pokemon use Water Gun, and have another use Ice Beam to freeze it while it's in the air to create a hefty chunk of ice to crush your opponent with. But in roleplays, those strategies are smiled upon. At least I smile upon them. <w<