Nice job on your submission.. I do have several suggestions though:
First- This is Dragon Ball Z. The only thing that should move fast and intense is the fight scenes... Not the dialogue. We are talking about the difference between DBZ and Speed Racer. Please slow it down so that I can actually read what they are saying.
Second - The sprites need to be animated with a bit more grace. The small fight with Frieza ended to abruptly.
Third - This is an animation using sprites..Therefore, please include more action and less dialogue. Did you ever watch DBZ just to hear them speak?
Good luck on your next one. I hope to see some improvement. :)