Kaiju Capsules

Kaiju Capsule (怪獣カプセル) are dark counterparts of the Ultra Capsule which bears the powers and physical manifestations of an Ultra Kaiju. They can also create Belial Fusion Beasts by loading two different capsules into the Geed Riser.

Triva

 * As an in-joke to Ultraseven's 50th anniversary celebration, the Kaiju Capsule are in joke to Capsule Kaiju from said series. Hence, one of the few differences between two devices are their names being simply rearranged.
 * Alongside the Ultra Capsule, its appearance as a capsule with caricatures of the characters reflected that of the Zyudenchi from the 37th Super Sentai Series, Zyuden Sentai Kyoryuger. Said series is also directed by Koichi Sakamoto, director of Ultraman Geed.
 * Serving as the Ultra Capsule's dark counterpart, the Kaiju Capsule is a tribute to the Deboth Army's variant of the Zyudenchi, which is empowered by their darkness instead of the Kyoryuger's braveries.