Formed from various powerful crews who managed to succeed in the New World, and the representatives and some other members have been prime contestants of the Corrida Colosseum, the crew is immensely powerful indeed. In sheer numbers, they have a grand total of 5640 people from various tribes and races, being quite versatile in strength and other attributes. Five of the seven leaders were powerful enough to defeat executives of the Donquixote Pirates.
Three days later, the seven crews assisted the Straw Hat Pirates in escaping from Dressrosa and avoiding capture by the Marines. Once they reached Orlumbus' ship, the Yonta Maria, the captains of each crew asked Luffy if they could drink sake and become subordinates of his. Luffy refused, but said they would still be bonded by their fight against Doflamingo and they would help each other out at anytime. However, the captains decided to drink the sake anyway, pledging to come to Luffy's aid whenever he needed them, while Luffy was not obligated to do the same. The Straw Hat Grand Fleet was then formed, and a party ensued as their fleet departed from Dressrosa.
The fleet then separated back into their own crews. Each captain took a piece of Luffy's Vivre Card. The Tonta Corps returned to Dressrosa to help with the rebuilding operations.
The five Straw Hat Pirates, Law, Kinemon, and Kanjuro traveled to Zou with the Barto Club, who departed after dropping them off a week later.
The Stories of the Self-Proclaimed Straw Hat Grand Fleet
While the Beautiful Pirates' were being chased by fans of their captain, Cavendish told Suleiman about his past.
The Barto Club visited an island under the protection of the Red Hair Pirates. After defeating a gang, they began selling Straw Hat merchandise to the citizens and they were later shown Shanks' flag. Bartolomeo and Gambia then committed a daring act of burning the flag down, much to the citizens' shock.
After parting ways with the Straw Hats, the Happo Navy journeyed back to their home country. Once there, Sai called off his engagement to Uholisia and received a serious beating from her. After his injuries were treated, he married Baby 5.
On the seas, XXX Gym Martial Arts Alliance sailed on a ship they received from Orlumbus and came across two rivaling forces. They proceeded to enter the fray and found out that their fight was part of a thousand year conflict between the Longarm Tribe and the Longleg Tribe. After subduing them, Ideo's group decided to customize their new ship using undamaged parts from the wreckage of the ships belonging to the rivaling groups. After finishing their ship, the group left the longarms and longlegs on the island to settle their issues. They later re-branded themselves as the "Ideo Pirates".
Back on Dressrosa, the Tonta Corps under Leo's command had become a pirate crew while Rebecca and Viola were making new clothes with the crew's Jolly Roger. Leo and his crew then went on to assist the Dressrosa citizens in rebuilding their homes and received a ship from them, which the crew then named "Usoland". Leo, Kabu, and Bian later had an audience with Riku Dold III and were asked to accompany him to the Reverie.