Well, since we're talking teams, my own is in the first link in my sig, and as you can see, it consists of 6 characters.
Most of them happens to be light, but in general, I'm not worried about the heavy hitters, who apply with least one of the following:
*Telegraphing (and yes, I can easily punish a human Lucas's Up Smash repeatedly, and a lone Snake will just tell me where he had placed his bloody mines, and telegraphing is telegraphing anyway, so chances are he won't touch you as long as you remember how he hits)
*Cooldown poorly (Dedede, I'm particularly looking at you, and no chain grabbing for you, you've been abusing anti-approach methods for too long to begin with)
*Are big targets, making them easy prey for jump attacks
Ironically, ROB can zap Marth and Meta Knight into oblivion. Maybe Marth and Meta Knight rely so much on beating the bajeezus out of their opponents that they actually can't handle anybody who has very good raw stats, which happens to be the case with ROB's heavy weight and solid mixture of attacks that results in quickly racked up damage and guaranteed strong launches, resulting in their swift deaths. Now I just have to watch out for those blasted Pits who can ambush me when I expect a Marth or Meta Knight, because I still have only one character who can handle them. And arrow spam is still ridiculous on Battlefield. >_>
Anybody else for me to watch out for?