Mission 21: Farewell, Blue Buster

Farewell, Blue Buster (さらば　ブルーバスター, Saraba Burū Basutā) is the twenty-first episode of Tokumei Sentai Go-Busters.

Summary
Finding the Energy Management Center base's air conditioner on the fritz, Hiromu and Yoko find Ryuji overheating before he loses consciousness. After the others get him to the medical ward, having met Masato earlier, Gorisaki frets when told by the man that Ryuji's inclusive medical checkup says he might die the next time he goes berserk. Hiromu and Yoko come up with a plan to save Ryuji before they are deployed to the Nakaya district where they face off against Dumbbellloid before they find themselves exercising against their will, allowing the Metaloid to escape. Soon after, after playing the age card, Hiromu convinces Kuroki to make Morishita the new Blue Buster, much to Ryuji's dismay. After the others train Morishita, telling him and Nakamura what they have learned, Hiromu and Yoko are alerted to the Rindo district where Dumbbellloid calls them out, as Beet Buster and Stag Buster join the fight. With Stag Buster forced into exercising, the others battle Dumbbellloid as Buddyloids enter the Buster Machines to face the Vaglass Megazord within 10 minutes' time. Overhearing Nakamura telling Kuroki of his condition, a speechless Ryuji takes his Buster Gear back to join the fight. Even after being told this might be his last fight and he can choose how he goes, Ryuji becomes Blue Buster to battle Dumbbellloid with a feat of strength before destroying him. By that time, after Stag Buster frees the others, Beet Buster reveals that he was joking to Gorisaki earlier, as Red Buster and Yellow Buster relay this new bit of information to Ryuji. By then, the Dumbbellzord arrives with Buster Hercules formed to back up the GT-02 Gorilla as it sends the Vaglass Megazord flying. With the enemy dealt with, Blue Buster uses the GT-02 Gorilla to attack Buster Hercules for the trouble Masato put him through. Later, as Ryuji gets Masato and J in a double headlock, Hiromu and Yoko are glad their friend is all right.