If you want to ask an RP thread creator if you can join their RP, do so in private - via conversation or profile messages - or via the thread's discussion thread, if one exists. Do NOT ask if you can join an RP on the RP thread itself!
This leads to a lot of unnecessary OOC chatter and that's not what the RP boards are for.
This is clearly stated in our RP forum rules. If you've not read them yet, do so BEFORE posting anything in the RP forums. They may be found here (for Pokémon Role Play)
or here (for General Role Play).
Remember that the Global Rules of Pokécharms
also apply in addition to these rule sets.