I'm just wondering why the no multi man brawl categories

You're right, this game lacks categories. Target Smash individual characters and Event ILs would be cool to have too. I think adding more short categories could attract more runners. Also PM has them, so I don't see why Brawl shouldn't.

These type of categories have been hosted on cyberscore since the dawn of time with decently active competition. https://cyberscore.me.uk/game/390 Anything non-RTA is not needed here, Boss Battles and Target Smash are only here because the original mods added it, cyberscore hosts the real history and active competition for them. PM/P+ has them because its not an official game so cyberscore will not host a page for it.