Why was the Evil Containment wave never used in DBZ?

[GogetaSSJ2]

Why was the Evil Containment wave never used in DBZ? It could have solved a lot of problems. Like stick Buu in a bottle or something. 

[Saiga]

'Cause it didn't do jack against Piccolo Junior and the fighters who could use it were all heavily outclassed by what they'd want to seal.

Also, it may only work on demons rather than just evil beings.

[Ketchup_Revenge]

Piccolo Jr also was able to reverse it on Kami. I guess the technique has a limit. But it also didn't make sense on how Goku's Genki Dama in the Boo Saga was in-effective on Boo's evil spirit when it stuck to Vegeta in the Saiyan arc like a tick on Dracula.

[GogetaSSJ2]

'Cause it didn't do jack against Piccolo Junior and the fighters who could use it were all heavily outclassed by what they'd want to seal.

Also, it may only work on demons rather than just evil beings.

But that's because Piccolo Jr. knew a reversal technique that could counter the evil containment wave. Buu didn't know any reversal technique so he could still be sealed up by the wave.

Just because the fighters who knew the technique were outclassed by Buu doesn't mean it's impossible. Take Piccolo for example. When he fused with Kami I'm sure Piccolo absorbed the knowledge of the Mafuba (aka ECW). I'm sure Piccolo could have access to a jar or a small bottle quite easily and perform the technique. Piccolo could have tricked Buu into standing still for a moment while Piccolo would unleash the Mafuba, Buu wasn't one of the brightest villains in DBZ. If Goten and Kid Trunks can tell Super Buu to stand still for a moment while they performed the fusion technique, I'm sure Buu is dumb enough to do the same for Piccolo to perform the evil containment wave.

[GogetaSSJ2]

Piccolo Jr also was able to reverse it on Kami. I guess the technique has a limit. But it also didn't make sense on how Goku's Genki Dama in the Boo Saga was in-effective on Boo's evil spirit when it stuck to Vegeta in the Saiyan arc like a tick on Dracula.

What do you mean by "in-effective"? The Genki Dama killed Kid Buu. I'm not sure I'm understanding what you're saying here.

[Saiga]

'Cause it didn't do jack against Piccolo Junior and the fighters who could use it were all heavily outclassed by what they'd want to seal.

Also, it may only work on demons rather than just evil beings.

But that's because Piccolo Jr. knew a reversal technique that could counter the evil containment wave. Buu didn't know any reversal technique so he could still be sealed up by the wave.

Even without a counter, we don't know that it would work on Boo since it was never used. It's possible that it would fail for a variety of reasons, such as him being too powerful, his magical nature, etc.

[Bussani]

You know how General Blue tried to use his paralyzing trick on Taopaipai, and it didn't work because he was just that much stronger? Or how Chiaotzu's psychic powers didn't work on Nappa? I wouldn't be surprised if Buu was so strong the Mafuba wouldn't work on him. That doesn't explain why they didn't try it, of course; like a lot of other techniques, everyone just seemed to forget about it.

[Pantalones]

I guess it's possible that Buu could just blow the Mafuuba back on whoever used it, just like what happened when the fat Buu tried to use his turn-stuff-into-candy beam on the skinny one in their fight.

As for the Mafuuba possibly just not working due to a power gap, well... Piccolo got caught in it and he was a whole lot stronger than anyone else around that time. Maybe the gap just wasn't big enough for him to be unaffected by it (it definitely wasn't anywhere near as big of a gap as what there would be between Roshi and Buu, or even the smaller but still ridiculously huge gap between Tenshinhan and Buu), but there was still definitely a gap.

[Puto]

Besides, if Boo can scream his way out of the room of spirit and time, then he can probably scream his way out of a bottle too.

[DBZGTKOSDH]

In Piccolo's What-If Story in DBZ: Supersonic Warriors, Piccolo sealed Evil Boo in a little bottle with the Mafuuba.

[NANLIT]

It could be pride as well. Piccolo Daimao originally rampaged over 300 years prior to his release and he scared Roshi so he used the technique that his master used, but failed. There's the drawback that those who use it die, but for these martial artists, they would preferrably die in regular combat as opposed to a technique like Mafuba. Thry didn't want to use the Dragon Balls to stop Dr. Gero before he released his Artificial Humans after all. Tenshinhan was desperate because he saw his comrades die and for all he knew, he was the only one capable of defeating Piccolo since no one knew what happened to Goku at the time.

Speaking of Goku, that could also be a reason. Goku was still young at the time but as he kept prevailing in his battles, his friends started believing that as long as Goku's alive, they have a chance. He gave them hope and Future Bulma said as much to Trunks.

Or maybe the fact that the Mafuba just seals them away. They could always return someday in the future to wreak havok another day. Better to either reform them (by having a common foe) or destroy them rather than to have them wait for their chance of freedom again. That's the problem I see with those sealing techniques; it's only a temporary solution.

[Fox666]

Not exactly, Piccolo still aged inside the receiper. And does he still needs to eat? Anyway, eventually anyone would end up dead. Although Babidi or Boo can live for millions or years...

[Saiga]

In Piccolo's What-If Story in DBZ: Supersonic Warriors, Piccolo sealed Evil Boo in a little bottle with the Mafuuba.

Isn't that the same game that gave him the ability to absorb Majin Boo and revive Freeza and Cell from the dead?

[Hellspawn28]

Seeing that it was useless on Piccolo then there was no point on using it again. Using it on Majin Buu would have been pointless since he could be strong enough to break out of the jar. If trapping him inside the ROSAT didn't work then something like the Mafuba would have done nothing to him.

[DBZGTKOSDH]

In Piccolo's What-If Story in DBZ: Supersonic Warriors, Piccolo sealed Evil Boo in a little bottle with the Mafuuba.

Isn't that the same game that gave him the ability to absorb Majin Boo and revive Freeza and Cell from the dead?

... I don't recall such a thing in any official DB product.

[Hitiro]

Let me answer this question with another question. Why use a technique that will just kill you after its used successfully? I'm pretty sure the characters don't want to get into a habit of dying to get rid of bad guys. Plus, out-of-universe, the story would be pretty dull if everything could be solved with that technique.

[Saiga]

In Piccolo's What-If Story in DBZ: Supersonic Warriors, Piccolo sealed Evil Boo in a little bottle with the Mafuuba.

Isn't that the same game that gave him the ability to absorb Majin Boo and revive Freeza and Cell from the dead?

... I don't recall such a thing in any official DB product.

Oh, wait, that's SSW2. During Gohan's what-if story Piccolo turns Majin and pulls a bunch of new powers out of his ass so he can be the main villain.

[Jackal puFF]

The attack was just too devastating and risky too use I think. Hell maybe if all the heroes got killed, Roshi might have tried.

[Nazi Cola]

Tenshinhan should've tried it against Cell instead of using the Shin Kikoho. Would've prevented so much arguing.

[DBZGTKOSDH]

Tenshinhan should've tried it against Cell instead of using the Shin Kikoho. Would've prevented so much arguing.

Remember, Cell has Piccolo's cells from Saiyan arc, so he would just use Reverse Mafuuba on Tenshinhan.