Thanks to Ca3:
Domon, of Timeranger, had instructed the Gokaiger to proect Megakure Shrine. In fact, an important item was enshrined there! Sealed inside a jar was Ninjaman!
Ninjaman was sealed into the jar 10 years ago by the Sanshinshou, due to a certain incident, and as such, was not able to participate in the Legend War. The Gokaiger will try and get the Kakuranger power from Ninjaman, but it seems like a difficult task...
Ninjaman decides to live with the Gokaiger aboard the galleon, to observe them. In other words, they have to impress him to get the power.
(Ninjaman, in Kakuranger, was a pupil of the Sanshinshou, and friend of Kakuranger. He has the ability to grow large, becoming Samuraiman)
Former NinjaWhite. 24th leader of the Tsuruhime-clan ninjas. Being of a Ninja squadron, the Kakuranger were able to evade Basco.
Title- Awatenbou Ninja (Confused Ninja)
Ninjaman appears from the jar in Megakure Shrine! Since he was sealed, and does not know of the Legend War, the Gokaiger explain old battles to him.
Title- Hero Goukaku (Hero Success)
The evil in the hearts of Don and Gai is magnified by the powers of the new Action Commander, Evil Spirit Faith Healer Jyujyu. With Ninjaman observing the Gokaiger, what is about to happen?!
Title- Uragiri no Hate (The Limits of Betrayal)
47 and 48 will showcase the final battle with Basco! In 47, Basco uses Sally, making a surprising strategy! Basco's final droids appear, Sunroid Solar and Goldroid Geronpa.
Title- Shukumei no Taiketsu (Showdown of Fate)
Second part of the final fight with Basco.