Fukasaku

When pushed to the limit of his abilities, Jiraiya can summon these two elder toads, Ma and Pa. onto his shoulders to enter a form called Sage Mode Despite Jiraya being an elder himself, he speaks to them quite respectfully, while they refer to him as "Jiraya-chan." It is known that Pa's name is Fukasaku, though his wife's name is unknown.

Abilities
In battle, they are quite formidable. Ma is shown to possess an elastic tongue and to be capable of breathing fire, and Pa can create huge gusts of wind as well as firing jets of water so concentrated and so fast that they can cut through solid stone. Combined with Jiraya's ability to spit oil, these abilities create a huge inferno, though it's capabilities are unknown, because the attack had never successfully struck the target. Also, they seem to be very intelligent, as they quickly determine a weakness in the Rinnegan

The two toads are also capable of very powerful genjutsu, by means of singing. This ability cancels out Jiraiya's lack of aptitude for genjutsu, making the combination that much stronger.

Infultration of Amegakure
When Jiraiya began to lose his battle with Pein, he called the aid of Ma and Pa to help him. With the two toads he transformed into his Sage Mode and began to battle the three bodies of Pein on seemingly equal terms. Unfortunately after the Toad Sennin used their genjutsu and Jiraiya killed the three bodies, Pein's other 3 arrived and turn the tables in the battle. After Jiraiya managed to kill one of the bodies, he had Ma take the body back to Konoha so Tsunade could study it. After she left, the battle took a tragic turn as Jiraiya was attacked by the five remaining bodies. Jiraiya knowing his end was near, carved an encrypted message onto Pa's back allowing him to escape, while Jiraiya succumbed to his injuries.

Post Hunt for Uchiha
After the 8-Man Squad failed mission to find Itachi or Sasuke Uchiha Pa remained in Konoha to inform his student Naruto Uzumaki that Jiraiya died in battle.