Duo

I guess that means he wasn't using Kaio-ken at all against Freeza or Cooler since he never spoke it.

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"Christianity is not about building an absolutely secure little niche in the world where you can live with your perfect little wife and your perfect little children in your beautiful little house where you have no gays or minority groups anywhere near you. Christianity is about learning to love like Jesus loved and Jesus loved the poor and Jesus loved the broken."

Zer0

Exactly.

Fine you got me there. >_>

They should of had Goku say x10, x20 or whatever they wanted it to be. It would have been easier.

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Duo

He might have in the Japanese version. It's been a couple years since I put the movie in so I can't remember. I just figure he used it to a factor of 10 because we know he was capable of doing so without exhausting his body too thoroughly. He used the 10-fold Kaio-ken against Tullece in Movie 3, which was spoken in the Japanese version.
The context of the situation can help, too. I "know" that Goku used the Kaio-ken x10 against Cooler's Last Transformation, because that movie was made to mimic elements from the Freeza arc. I also "know" that Goku's last Kaio-ken in that battle was a 20-fold, and was used in sync with a Kamehameha, because he did the same thing against Freeza.
If it makes sense, run with it?

__________________
"Christianity is not about building an absolutely secure little niche in the world where you can live with your perfect little wife and your perfect little children in your beautiful little house where you have no gays or minority groups anywhere near you. Christianity is about learning to love like Jesus loved and Jesus loved the poor and Jesus loved the broken."