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What episode does luffy go gear second for the first time?Read more: What_episode_does_luffy_go_gear__for_the_first_time
At the battle of Marineford, it was shown that Kizaru was still easily faster than Luffy's Gear Second speed. It is not known if Luffy's speed has increased further after the timeskip.
As of the latest issues, Luffy has only used up to Fourth Gear.
after using gear third at ennies lobby..he wanted to open a door...
He learns gear third during his fight with Rob Lucci trying to save Nico Robin from the world government.
Luffy defeats Doflamingo with his near 'Gear 4' techniques. Gear 4 blows air into his muscles, and hardens his skin with haki, without making it any less elastic. This let him deal incredibly powerful punches by contracting his arm into itself and letting it recoil. In the last blow of the fight, Luffy used a bit of Gear 3, inflating his compressed arm to giant size, smashing through Doflamingo's attacks and defences, and punching him straight through the bedrock into the underground port.
He says he comes up with it after losing to Aokiji, but he first uses it and mentions it against CP9's Blueno
With Haki and Gear 2. Maybe some Gear 3 too, just to be on the safe side, but it's not really necessary as Goku is an old, washed-out shonen character from the past.
you unlock the APC
I think Ichigo Kurosaki would kill Monkey D. Luffy because Ichigo has bankai and that would decently damage Luffy. Also because Ichigo is a soul reaper (the good kind.) However luffy's haki is really strong he could use Bososhuko haki to defend himself and make powerful punches and also luffy would read ichigos attacks like a book (except hes to stupid to read)with kenbonshuko haki and he could destroy ichigo with gear second and third
I think Hollow Ichigo would win. You see, his bankai is fast and his hollow form gives him power. Now add that together and you have the ultimate combo. Also, Ichigo's Black Getsuga Tensho is very powerful. Ichigo can also turn into Getsuga Tensho (that's how he defeated Aizen the first time). Ichigo can swat every attack like the time he swatted the senbonzakura kageyoshi with the fight with Byakuya Kuchiki. Bring on the arguments in the discussion corner.
Aokiji soundly defeated Luffy in their first encounter. Luffy had no way around Aokiji's logia-type powers. Now Luffy's trained his haki skills, he can at least hit him, and it would be interesting to see how the heat generated from Gear Second may work against Aokiji's frozen attacks. However now Aokiji has resigned from the marines, there doesn't really seem a reason for them to fight.