Mission 18: Cooperative Operations 3,000 Meters In the Earth

Cooperative Operations 3,000 Meters In the Earth (地底3000メートルの共同作業 Chitei Sansen Mētoru no Kyōdō Sagyō?) is the eighteenth episode of Tokumei Sentai Go-Busters.

Summary
While Yoko gets into an argument with Hiromu while she is studying beetles, Kuroki talks to Ryuji about the new development from Masato and Beet J. Stag before they are alerted to not only a Metaloid created in the Gunno district but Vaglass Megazord's arrival within seconds before no longer being detected. Arriving to find a hole 3,000 meters deep, the Go-Busters are at wits end on how to get down before being alerted to the Metaloid in the nearby factory. As Kuroki and the others analyze the hole, the Go-Busters find Drilloid 2 and fight him before he escapes underground. By then, Kuroki reveals that there is raw Enetron source underground before he gets a call from Masato. Taking Hiromu and Ryuji with him, using the former's Weakpoint to force his assistance, Masato leaves J with Yoko to track down Drilloid 2. Though confused by J's antics, Yoko is surprised when Drilloid 2 appears as she and J transform to fight the Metaloid. Yoko's Weakpoint soon takes effect and Drilloid 2 stops her from eating a sweet. However, Stag Buster holds him off so she can replenish her strength with some tree sap. Even though Stag Buster reveals that Masato has ordered him to follow her, Yellow Buster does not mind, just as they finish the Metaloid off. At that time, using the BC-04 to get to the bottom of the hole, Go-Buster Ace defends them while a pair of Bugzords appear on the surface for the GT-02 Gorilla to deal while the Megazord finds himself facing Drillzord 2 and even more Bugzords. After having Beet Buster lower the BC-04's crane down, Red Buster has Go-Buster Ace use the BC-04 to reel the Megazord back up to the surface. With the RH-03 Rabbit supporting the GT-02 Gorilla in destroying the Bugzords, and while Go-Buster Ace takes out the ones below, the SJ-05 Stag Beetle carries Drillzord 2 into the city as Go-Buster Beet fights the Vaglass Megazord before finishing it off. Soon after, Masato goes ballistic on J for blabbering about the orders he gave him to help Yoko.