Best underdog(s) to have in a fight

[XYLM]

For me It has to be Ewoks.

[http://s236.photobucket.com/albums/ff209/JDG331/?action=view&current=ewok1.jpg]

I mean they are hairy midgets using bows, arrows and catapults yet they were still able to bring down an enemy that was using futuristic weapons and armor.

 

[burningdragoon]

I think answer here should be obvious...

 

[Super Toast]

Dick Dastardly. You gotta admire his dedication to fighting dirty.