From The TimeSplitters Wiki

Duckboy

I am the super duck that saves the day! Ordinarily I'm a regular duck, but when someone need help, I turn into Duckboy! In real life, I'm just an ordinary kid that likes enjoying summer and acts like a lazy kid. I only have TimeSplitters 2 and TimeSplitters: Future Perfect so i can't help with TimeSplitters.

Ps. I didn't want to say Duckman Drake because he our favorite man-slaying duck from TimeSplitters