is one piece episode 338 filler?

Brook is aboard the Thousand Sunny, greeting everyone, refers to himself as "Just Dead Bones" Brook. Chopper is seen with a cross.

Brook approaches Robin, commending her beauty, and asks if he could see her panties. Nami comically hits him calling him a perverted skeleton.

Usopp gathers exorcism materials and began an attempt to exorcise the evil spirit. Brook inquires where the evil spirit is, and Usopp and Chopper comically reply it is him.

While in the ship, Brook mentions he has not had food to eat in so long and requests milk to drink. Luffy calls him "Korobokle" and Brook corrects him.