As a low level sayian you were mocked and taunted at by your fellow brethren, you were always given small jobs you hated.

Hence as to why you are in Equestria right now, to depopulate the weak equine species known as ponies. You had always wanted a challenge to prove that you weren't a weakling as they stated.

Fortunately, this so called "weak" planet you were on would provide that challenge, but then again you would have your work cut out for you throughout this conquest.

(something's are going to differ from the dbz universe, so for future reference do not bitch at me that Aw! this is wrong Aw! the back story of the siayans is wrong. Just don't kay? There's nothing more annoying than a person claiming he knows everything about dbz and wants the story changed to their specifications.)