One Piece Episode 61 -

After leaving Warship Island, the Straw Hat crew is confronted by Eric the Whirlwind, who attempts to steal the "Dragonite" (fossilized dragon bones) from the Sennenryu.

This episode is unique because it is split between filler and manga-canon content: One Piece Episode 61

Luffy takes on the fight personally, fulfilling a promise to the dragon Ryu. He eventually defeats Eric by knocking him off the ship as they approach the Grand Line. After leaving Warship Island, the Straw Hat crew

Concludes the anime-only Warship Island story, including the final defeat of the antagonist Eric. After leaving Warship Island

The crew reaches the massive Red Line continent. They must navigate the Going Merry up the dangerous currents of Reverse Mountain , which is the only way to enter the Grand Line from the East Blue.