|This article is about a/an morpher in Doubutsu Sentai Zyuohger.|
- "Wild Instinct, Awaken!"
- ―Transformation announcement[src]
The Transformation Gun Whale Change Gun (変身銃ホエールチェンジガン Henshin jū Hoēru Chenji Gan) is a weapon which can transform its user into Zyuoh Whale. Little is known about this weapon at this time except that it has five modes: transformation, final attack, summon, cube transformation, and final combination.
The Whale Change Gun was born from the Earth's power during an attack on Earth by a powerful monster in ancient times. A brave Zyuman by the name of Cetus used it to transform into the first Zyuoh Whale and defeated the monster, while also awakening a massive Zyuoh Cube known as Cube Whale. Upon the creation of Zyuland, the Whale Change Gun was later sealed into a golden cube known as the Great King's Credential (大王者の資格 Dai Ōja no shikaku) and formed the core of the Link Cube.
In present times, Bangray, a Megabeast Hunter, came down to Earth, knowing of the existence of Cube Whale and thus wanted to hunt it down by taking control of the Great King's Credential. Soon, he caught the attention of Captain Marvelous, who also wanted to take the Great King's Credential, which he regarded as treasure. Marvelous later encountered the Zyuohgers, who led him to the Link Cube, with a revived Dorobozu spying on them in secret. There, Marvelous found the Great King's Credential hidden within the Link Cube. The Great King's Credential transformed into the Whale Change Gun, which broadcast a message from Cetus about the history of Zyuland. However, thanks to Dorobozu, Bangray was able to find them as well. As Marvelous, Bangray, and the Zyuohgers fought one another, Marvelous gained possession of the Whale Change Gun and tries to escape.
When Marvelous later felt that Yamato was worthy enough to use the Whale Change Gun, he entrusted the weapon to Yamato. The Whale Change Gun immediately transferred Cetus' Zyuman Power into Yamato, with Yamato seeing Cetus' spirit giving his approval.
When Yamato was disarmed of the Whale Change Gun by Azald, Bud took it upon himself to recover and wield the weapon originally used by the ancient Great King. Performing the Deep Lock, Bud succeeded in freezing Azald in place just before he passed out as his transformation negated. However, Azald, broke free soon after and, having remembered who he was, assumed his true form as it was finally revealed that he was the monster that Cetus and defeated ages ago as he ferociously defeated the remaining Zyuohgers.
After the Zyuohgers finally destroyed Ginis, defeating the Deathgalien once and for all, Yamato returned the Whale Change Gun along with the six King's Credentials to the Link Cube, which had the unexpected effect of the Link Cube merging the two worlds into one, restoring the world to the union of humans and Zyumans prior to the Link Cube.
To transform, the handle grip of the Whale Change Gun is pulled, unfolding the golden cube portion to reveal the cannon portion. shout "Wild Instinct, Awaken!" (本能覚醒 Honnō Kakusei), The user then raises up the Whale Change Gun and pulls the trigger, causing it to shoot out streams of water and transforming the user into Zyuoh Whale.
- "Zyuoh Fina~l!"
- ―Finisher Attack announcement[src]
By pulling back the charging handle three times and then pulling the trigger, Zyuoh Whale can execute a Zyuoh Final (ジュウオウファイナル Jūō Fainaru) attack. This finisher has two variations:
- The first finisher, which supposedly only Zyumans can use, is called Deep Lock (ディープドロー Dīpu Rokku), where a large beam is fired from the Whale Change Gun, sealing its target. This was used by the first Zyuoh Whale to seal Azald Legacy.
- The second finisher, used by the current Zyuoh Whale, is an unnamed finisher where an extremely powerful blast is fired from the Whale Change Gun. This blast is so powerful such that it is fast enough to travel to the moon and back without diminishing, up until it hits its target.
- The Whale Change Gun is the only changer in Zyuohger to not contain the word Zyuoh.
- The Whale Change Gun is the only transformation device which has less restriction than the others transformation devices of Zyuohger.
- The Zyuoh Changer and Zyuoh The Light can be used to transform a Zyuman or a human with the power of a Zyuman while the Whale Change Gun only for its chosen warrior, regardless of whether or not he/she is a Zyuman or a human.