Is ONE PIECE episode 133 filler?
Filler Yes, episode 133 of ONE PIECE is filler.
#133
A Recipe Handed Down! Sanji, the Iron Man of Curry!
受け継がれる夢！カレーの鉄人サンジ
Aired 17 Nov 2002
Mochibayo compiled this list from MyAnimeList's labels, because MyAnimeList's episode data is not reaching us at the moment.