One Piece Chapter 12, page 9: Chapter 12: DOG

An elderly man wearing armor and carrying a spear suddenly appears, shouting, 'Dern whippersnappers! Don't you pick on poor ol' Chou-Chou!' Luffy, still holding the dog, asks, 'Who're you, old timer?' while Nami repeats, 'Chouchou?' The old man proudly strikes a pose and declares, 'Who am I? I'm the mayor of this town... That's who!' A caption identifies him as 'Boodle Mayor of Port Town'.