I thought the point of
Death Battle was to
not make shit up, yet...they used 10x for Super Saiyan 4...right...
I just use a varying multiplier. Whatever the user's potential is at the point of transformation, blam, that's the power increase.
As for Baby and Goku...
Episode 37
Time: 13m25s
Context: Bulma is frantic after seeing Baby knocked out
Bulma: "There's no way Baby-sama could be done in by a Saiyan!"
Note: In the dub, she says the only way to revive him is the Bruits wave amplifier.
Episode 37
Time: around 15m10s
Context: The Bruits wave amplifier is reviving Baby
Baby: "W-what is this? Power! I'm being filled with power! What is going on?!"
Bulma: "Baby-sama, it's the Bruits waves! Your whole body is being bathed in Bruits waves, so please, regain your strength!"
Episode 37
Time: 20m5s
Context: As Baby approaches Goku
Narrator: "Great Ape Baby has regained his full power, while Son Goku has barely any power left. Will Goku be able to fight his way out of this critical pinch?"
Note: In the dub, the narrator mentions Kibitoshin turning key players back to the good side with the Ultra Holy Water, and wonders how long Goku can hold his ruse up.
Episode 38
Time: around 40s
Context: Beginning episode narration
Narrator: "The Great Ape Baby had recovered his full power, while Son Goku had hardly any power left! Will Goku be able to fight his way through such an overwhelming difference in power?"
Note: In the dub, the narrator doesn't mention any of this.
Episode 34
Time: around 3m55s
Context: Pan suddenly stopped moving
Mister Satan: "Pan-chan, what on earth is the matter?"
Pan: "It's a Ki! Right now, I can feel a strong Ki!"
Mister Satan: "What do you mean?"
Pan: "I can tell! This strong Ki, it has to be Grandpa!"
Note: In the dub, Pan doesn't specify power. Instead, she talks about a strange feeling she has.
Episode 34
Time: around 4m40s
Context: Baby recovering in the rubble
Baby: "Man, what incredible power! [ ] But don't go thinking that just because you've gotten so huge, you've also become that strong! [ ] I'll make you regret that you survived!"
Note: In the dub, Baby talks about the advantage his race has over Saiyans, which is genetic engineering, instead of mentioning Goku's power.
Episode 34
Time: around 6m35s
Context: Pan and Mister Satan have just arrived at the battlefield
Pan: "I can sense his Ki growing stronger and stronger."
Mister Satan: "Y-you mean Goku-san's Ki?"
Pan: "Right. He's fighting to defeat Baby!"
Note: In the dub, Pan talks about where Goku's energy is coming from, and then confirms that the giant ape is him, instead of mentioning his actual power.
Episode 34
Time: 7m45s
Context: Kibitoshin is wondering what's going on with Goku
Elder Kaioshin: "As a result of us suspending his training right in the middle, and forcibly drawing his tail out, he is still unable to control his mighty power."
Episode 34
Time: 10m15s
Context: Kibitoshin is about to go cut Goku's tail off to return him to normal
Elder Kaioshin: "If you cut off his tail, then all of his power that we worked so hard for will be lost! And it's not as though he has defeated Baby yet. That is absolutely our final measure."
Kibitoshin: "S-so then..."
Elder Kaioshin: "If he can recover his rationality and control that incredible power of his, he will indeed become Super Saiyan 4."
Episode 34
Time: around 20m0s
Context: As Goku is regaining his rationality
Baby: (thinking) "What Ki is this?"
Note: In the dub, he wonders what the transformation is that he's sensing.