My brother weight 46 kg, he is 15 years old. He is the red corner http://www.youtube.com/watch?feature=player_embedded&v=mL4TC3CHUl0
Good counter-left hook from the first round. Also knows how to parry a jab and stick his own back in there. Also like how he finishes up with a straight right. Good jabs to the body and combinations to the head and body in the 2nd round. Stiff jabs and pull-counters in the 3rd. Good movement in general. The way he pauses and times his shots out of a high guard seems like he's trying to channel a young Floyd Mayweather Jr.