If you're just looking to spitball some ideas, make a thread in Idea Engineering.
If your character is at the point where you've got it running in MUGEN, make a thread in Projects and put some open betas out if you want critique.
Once the character's in a releasable state (i.e. hopefully not a horribly buggy punching bag) make a thread in Releases.
Now listen all you boys and girls,
All around the world,
Don't be afraid to get up and move!
You know that we're all Super Stars,
We're the ones that made it this far!
Put a smile on that face,
There's no time to waste,
Oh, let's do The Odyssey!