Southperry Pokemon League.

Any gym leader available?

Also we shouldn't give hints or stuff about leaders/challengers to keep the fun going on for others.

It's totally allowed. Nothing I mentioned should be particularly surprising given their typings. Poison is SE vs Grass and there are only so many good Fairies to choose from. Don't think for a second that the GLs aren't talking amongst each other about our respective teams. The 2nd leader I fought was aware well in advance that my Shuckle was a threat to him, and what pokemon I prefer to use as my lead/what its role is.