[Theory] What Gear 4 Actually Is

Vandenre1ch

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Should've done this earlier before the hurricane of G4 threads blew through but oh well I forgot.

G2 increases Luffy's blood flow to increase speed. The force of his attacks gets a slight boost in power also. As a side effect, it drains his stamina.

G3 increases Luffy's bone structure to giant proportions to give him a huge increae in power. However, Luffy sacrifices speed.

Luffy used both G2 and G3 against Doflamingo, but both were useless. When Luffy used G3, Doffy effortlessly reacted to it by setting up Spider's Web and Luffy had to pll his punch back. Wih G2, Doffy said that it has a lot of speed but lack power. In response to this, Luffy bit the skin, tissue and muscle of his arm and said "Gear....4."

G4 will combine both G2 and G3.
G4 will contract Luffy's muscles and accelerate them beyond their limits. It will increase his brute strength and the speed that his muscles can move. Luffy will lose his ability to stretch but his new abilities more than compensates for it.

G2=Blood for speed
G3=Bone for power
G4=Muscle for speed and power(it will have less speed than G2 and less power than G3. Pretty much the full package and balanced)

This new limit break will also help Luffy to ignore his pain and injures. However, it doesn't last long, its hard to control and it will cause his muscle structure to gradually fall apart and will cause him intense pain when it wears off. Its very similar to the 8 Inner Gates in the series Naruto.


Edit: Almost forgot. Luffy also hasn't mastered G2 yet. Red Hawk is the prototype for G2 mastery. With G2, Luffy body temperature increases and with G2, he concentrates the blood into his arm and the temperature gets so high that his arm bursts into flames. CoA is mandatory for his elemental resistance(and increased endurance, durability and power). It keeps Luffy from burning. Full body CoA with a full body Red Hawk is the complete G2.
 
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Punk Hazard

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I don't know, I feel like Luffy mastered Gear 2 once he hit partial Gears and controlled when they wear off, most likely due to Life Return, which I feel like Luffy knows.

I also don't see why increasing his muscle would lessen his speed. Luffy can lift like, tons. I doubt an extra 20 pounds of muscle to his scrawny ass body is gonna be too much to handle. If this is supposed to increase his muscle output, it should make him even faster.
 

OG sama

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Doffy said he lacked power but yet fourth gear is going to be even weaker and also slower than gear 2 and 3 respectably? Yeah I don't really agree with the idea. He needs more powerful attacks than g3 his speed seems fine though.
 
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I think Luffy is bluffing, he's just buying time until Zoro gets there to save his rubber ass. Luffy knows well that Zoro is the only one in the crew who can go toe to toe with Donquixote kindesu.
 
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Mephew D Kensei

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I think G4 is a move on the muscles too and that it will habe more streght than 2 but less than 3 then faster than 3 but a bit less than 2. G4 is a stallion/thoroughbred its fast and firm, i dont know about your he wont b stretching prediction but i wld say becoz the muscle(probably the most content of rubber of him) will b condensed he will stretch shorter but the recoil will b stronger and more explosive(figure o speech)which is why 4 will b faster and stronger than 3 and 2 respectfully.
 

saw2097

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That's actually an interesting idea, it would round things out.

And I suspect that he hasn't mastered any of his gears, that won't be until the end of the series, each of his gears will have a final upgrade. For instance Gear 2 having a full body flaming hawk mode, and gear 3 (this is a theory but he will be able to turn into a giant by inflating himself), and we will see with Gear 4.
 

Anduril

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I hope Oda shows something that nobody here has thought off, its getting extremely redundant, it will be a nice breath of fresh air in the manga.

P.S - I personally think it will be a full body haki armour, with no stretching or anything pure speed and shit.
 
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24 12 11 to troll

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Jesus christ, how hard is it for people to grasp the simple concept of internal combustion!?

It would cover both speed and strength because of the shockwaves the detonations (from within his body) would create. On top of this, the internal combustion would be a great handicap for Gear Fourth to have, as Gear Fourth is expected to be superior to Gear Third in terms of power.
 
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