Let's just get to this. I'm Danny, I was bored, couldn't find a tool that did this, made/am still making this.
What does it do?
Like, the title says, it's a Battle Frontier Editor. However, it's not just for the Battle Frontier; you will also be able to edit the Slateport, Verdanturf, and Fallarbor Battle Modules. Eventually, you'll be able to edit the Battle Pyramid wild Pokémon and the Frontier Brains.
Very early, still working on it, I started working on this today.
Oh, make sure you add support for extended Pokemon and moves. There's a tool called Nightmare that can edit the battle frontier if you download the right modules. Sadly, it didn't want to work with my extended moves so I had to do it all in a hex editor. Wasn't fun.
Hey guys! It's been a while, sorry about that. I currently can't program (at least in C#) on my computer, so I'm making this on my mom's.
Anyways, here's a little alpha. You can only edit Verdanturf, and the offsets are hardcoded (don't worry, this is just for now). I will be adding XML soon, so don't worry. Also, EVs editing will be implemented soon.