One Piece Episode 637 English Dubbed Episode Title:Big Names Duke It Out! The Heated Block B Battle!Episode Description:Seeing that his true identity is exposed, Luffy tries to defend himself from Chinjao's devastating headbutts and Cavendish's irrational hatred while trying in vain to convince them he's "Lucy". Luckily, Chinjao's grandsons manage to intervene and halt Don Chinjao's rampage before he gets disqualified. They convinced him that they should focus on the "real prize" and that since Luffy is in Block C, they can kill him in the ring without repercussions. Cavendish, however, intends to kill Luffy before the match and proceeds to hunt down Luffy, who escaped the fight and is hiding outside, hanging underneath the stands window.