So what would you reccomend as a difficult bot to fight?

[Kujii]

I'm attempting to either find a potent robot in-game, or that I can download to fight against, that would inevitable pwn me over and over unless I actually made something worth fighting. I currently don't think my bots are too effective, I've hoping to improve this like that.

[Sage]

YES this is the best way to improve. Download any good AI pack (scv3, infai, etc) and there will be plenty of bots to fight against to test your mettle.

[GroudonRobotWars]

I just take a normal stock AI and ai extra teams when I beat all the currently added teams then I continuely add more once all the current added teams are beaten.

[Fracture]

Depends on the weight class, but some good general AI packs are:

InfiniteInertia AI
Starcore AI (v4 is the hardest, of course)
BBEANS AI
ReStocked AI
PYS AI

[The Ounce]

It depends on what AI pack and which weight class.  As far as downloadable bots go, Nuclear Fallout is currently one of the wedgiest HWs in stock RA2 (lol shameless self-promotion).

[Kujii]

I've been playing DSL here.

[Ben Purse]

NAR AI or 123 AI.

[123savethewhales]

123AI

If you want to be more specific, Rotation Powered Pulsar