I'm presuming your refering to the fight between Luffy and Usopp back on Franky's island WaterSeven/Aqua Lagoona.
Well they were fighting over whether they should leave their ship, Merry, behind as it had become broken beyond repair after their visit to the Sky Island.
Usopp wants to save and repair the Merry, but Luffy see's sense and knows it's safer to leave the Merry behind.
Usopp challenges Luffy to a dwell, which Zoro forsees and prevents the others from getting involved and stopping them.
Luffy, enevitably, wins.
Episode 236
As of the latest manga, Roronoa Zoro - Swordsman, Usopp - Sniper, Sanji - Chef, Nami - Navigator, Tony Tony Chopper - Doctor, Frankie - Shipwright, Nico Robin - Archaeologist, Brook - Musician.
In the anime they haven't yet. But my prediction is that if they fight eventually Luffy will own him. Mainly because he can hit logia users with haki now.
153 to bout 190's
The fight between Luffy and Crocodile starts from episode 122
332 and 333
Episode 236
it is in episode 3.
he defeated lucci in episode 309
He is Usopp. He used the mask and the name because that time he and Luffy had a conflict.
Usopp is 19 years old at the start of the story and is currently 26 years old in the One Piece series.
Yes. Sogeking is a masked disguise that Usopp used, so he could support the Strawhat pirates even though he had left them. Only Luffy was fooled though of course.
He did in fact leave the crew just before the Enies Lobby arc, but afterwards he begged Luffy for forgiveness and asked if he could rejoin the crew, which Luffy allowed.
As of the latest manga, Roronoa Zoro - Swordsman, Usopp - Sniper, Sanji - Chef, Nami - Navigator, Tony Tony Chopper - Doctor, Frankie - Shipwright, Nico Robin - Archaeologist, Brook - Musician.
The main pirates are the strawhat pirates which consist of 9 members Captian:Monkey D Luffy Crew:Zoro, Sanji, Nami, Usopp, Chopper, Robin, Franky, Brook.
In the anime they haven't yet. But my prediction is that if they fight eventually Luffy will own him. Mainly because he can hit logia users with haki now.
If I can remember correctly, the Strawhats gathered on the edge of the bridge at Judiciary Island and confronted the CP9, Robin and Franky, who faced them on the small floating island above the giant waterfall. Usopp, disguised as Soge King, presented everybody with his new weapon, Kabuto, when Luffy asked him to burn down the Marines flag. From what i can remember, i don't think there was an episode explaining how Usopp got his new weapon.. Anyways it's on either episodes: 278 or 274 =]