I've had ideas for original moves for the Mugiwara's and I'd like to share them with you.
Luffy:
Gomu Gomu No JET Hanabi- Essentially normal Hanabi, with the added speed and push from Gear 2.
Gomu Gomu No JET Storm- UberHAX version of JET Gattling.
Gomu Gomu No Gigant JET Pistol- Luffy enters Gear 3rd while in Gear 2, using a giant fist with the speed of Gear 2nd and the power of Gear 3rd. However, after using this move, not only does Luffy shrink, he also is set on fire. RISKY MOVE.
Zoro:
Kyuutoryuu: 324 Pound Hou- Upon entering ASHURA form, Zoro will use the power of 108 pound cannon, multiplied by 3. However, when using 324 pound cannon, The shockwave will take the form of a large serpentine dragon, swirling with Zoro's "aura", Zoro can control the direction this dragon of swirling blades will go, and the effect of the impact is proportional to a sea tornado.
Sanji:
DIABLE JAMBE: Steake Frit Assaulte- Sanji will ignite BOTH feet with Diable Jambe, and proceed to unleash a flurry of kicks with both feet, sort of like Gomu Gomu No Gattling. After the flurry of flaming kicks, Sanji will lunge both feet at the enemy with amazing power.
Usopp:
Hissatsu 10,000 Meteor Stars- As Sogeking, Usopp will launch a 100 exploding stars at once, However, each star will, instead of exploding, burst into 5 stars each, in total, 500 exploding shots. As the shots rain on the opponent, they will explode on impact, covering the ground in a flurry of explosions, powerful enough to destroy 4 buster call ships, However, it uses up his entire supply of stars. While the sounds of explosions are heard, Usopp will turn around, striking his signature pose and state "ORE WA….SOGEKINGUU!"
Note: Even though he doesn't really fire 10,000 shots, Usopp thought it would sound cooler than 500. Calling it 10,000 shots also tricks the opponent.
Franky:
BREAST FIRE!- Using his entire supply of Cola, Franky's upper chest will open up, revealing two cannons, however, instead of cannonballs, they fire a HUGE LASER BLAST. However, upon using it, Franky is drained completely.
That's all I have for now =/