The epic Freiza vs Goku debate

[Drake]

Originally posted by Mighty Dabura
Go to hell, bitch.

The Kaioken is essentially Goku's own power, since he's the only one in the entire manga that can use it. It's just a plot device that enables him to fight with the new villians who would be far, far beyond him otherwise.

It was a plot device to do just that, but it was replaced by Super Saiyajin later on since it had obvious limitations- one being it killed him when used at max power.

Originally posted by Mighty Dabura
During the first chapters with his battle against Freiza Goku was using Kaioken x10 (Freiza says he can tell that Goku is holding back, which is true because Goku's only using half his power). Kaioken x20 was his limit, just like Kaioken x4 was the limit on earth. He made one Kamehameha attack with it, failed, and broke out the Spirit Bomb because he was too drained to do otherwise. (the pictures I posted earlier in the thread shows this).

Kaioken x20 was his limit, but it wasn't anything like KKx4. The Kaioken x20 was closer to when Goku used a 3 times Kaioken, as his reaction and statements are the same however as we also see- his body didn't have the same reaction. When using it against Furiza he was drained but his body didn't start to fall apart like it did in the Saiyajin saga which implied he could have gone further- but he didn't.

Why? Because going past x20 was likely impossible it was the complete mastery of the technique.

Originally posted by Mighty Dabura
Nobody else learns it because they don't need it. It's a plot device, just like every source of power. Vegeta is already an elite (natural strength), Gohan has massive potential (hidden strength), Goku has Kaioken (hard work). You'll see in the manga that Goku teaches Gohan his thematic principle of hard work to bring out his son's hidden strength in the RoSaT.

It was was a plot device, which was later replaced by SSJ which is why no one was taught it- as it was ineffective and damaging to your body. Also, Goku isn't a genius of hardwork- this isn't Naruto, he was considered a genius fighter with unlimited potential and exhibited as such with his ability to rapidly adapt and grow in strength throughout the entire manga.