Gamahiro

is comparable in size to Gamabunta. When summoned during Part I he is not named. It is not until Part II that his name is revealed. He carries two large swords on his back.

Part I
He first appeared in the Konoha Invasion arc when Jiraiya used him to fight Orochimaru's large snakes by using Summoning: Food Cart Destroyer Technique. Jiraiya summons him again in the anime to help Sasame Fuma, Sakura Haruno, and Naruto Uzumaki get out of Orochimaru's hideout.

Part II
Gamahiro makes his Part II debut when he, along with Gamaken and Gamabunta, are summoned to assist in Naruto's fight with Pain. They combat the various animals summoned by the Animal path until they are sent flying beyond Konoha's borders by the Deva path's Shinra Tensei technique.

Trivia

 * He has different skin color between the anime, where he has a green and brown theme, and the manga; where he has a bluish theme. This is most likely due to him being colored in the anime before the manga.
 * In Naruto Shippūden: Ultimate Ninja 4, Gamahiro appears as a little catchable toad that is called "Professor" due to his interest in geography and such. He is not like the Gamahiro of the anime / manga - he is little, sports a teacher hat, and likes geography.