Full Throttle Power! Chōji, Ablaze!

is episode 113 of the original Naruto anime.

Synopsis
Freed, Chōji volunteers to stay behind and deal with Jirōbō to give the rest of the team a chance to catch up to the other Sound Four members. As the team goes on, Chōji eats the first of the Akimichi's Three Colored Pills, increasing his strength. Doing so proves enough to overpower Jirōbō, forcing him to advance his cursed seal to its first level. With Jirōbō now having the upperhand, Chōji takes the second Akimichi pill.