is one piece episode 296 filler?

The fight between Nami and Kalifa climaxes. Kalifa sweeps the room with a tidal wave of power-draining bubbles to counter Nami's illusions.

Barely escaping, Nami manages to prepare and release her finishing blow in the form of a horizontal lightning bolt. Franky, who had followed Chopper in climbing up the walls of the Tower of Justice, arrives as she is about to retrieve Kalifa's key.

A moment's discussion later, they conceive of a plan. They follow Chopper into the room where Zoro and Sogeking, still cuffed together, try to fight Kaku and Jabra.