|This article is about a/an mecha in Zyuden Sentai Kyoryuger .|
- "Boom, boom! Hammer 'em, Bunpachy!"
- ―ED theme lyric[src]
This Zyudenryu is usually normally hidden behind the Mannen Falls (万年滝 Mannen-daki?) in China until summoned. When assuming Battle Mode, his "forehead" deattaches to become a spiked flail for a tail, all while revealing his true forehead, which resembles a yellow hard hat on his head. When combined with a Zyuden Giant, Bunpachy's flail is then called the Bunpachy Ball (ブンパッキーボール Bunpakkī Bōru?).
One of the Ten Great Zyudenryu members, Bunpachy was a Pachycephalosaurus that agreed to be modified to fight the Deboss Army in ancient times, but was lost over the eon-long war with the invaders.
Bunpachy was sought after by Ramirez, who is close to finding the wayward modified dinosaur. Bunpachy was later found along with the Spirit of his partner, who trains the modern-day Kyoryugers to see if they are worthy of receiving Bunpachy's power.
When the Deboth Army re-emerges 100 years after the Kyoryugers defeated Transcendenterfly God Deboss, Bunpachy is partnered with Souji's descendant Soujiro, who becomes Kyoryu Gray III before he discovers his true color and partners with Zakutor as the second Kyoryu Green.
Combinations featuring Bunpachy
- Kyoryuzin Kung Fu ◆◆◆
- Pteraiden-Oh Bunpachy ◆◆
- Plezu-Oh Bunpachy ◆◆
- Bakuretsu Kamitsuki Gattai Bakuretsu Kyoryuzin ◆◆◆
- Kyosei Kamitsuki Gattai SpinoDaiOh ◆◆◆
- Bunpachy Zyudenchi (ブンパッキー獣電池 Bunpakkī Jūdenchi?): 4 gray Zyudenchi (originally 2) holding the Kyoryu Spirit of the Pachycephalosaurus; associated with Kyoryu Gray. Three copies of this battery are given to the present Kyoryuger team, while the fourth is utilized by Kyoryu Gray. When used in a Gaburivolver, it unleashes an attack similar to Kyoryu Gray's Violent Breakthrough technique called Iron Ball Brave Finish (鉄球ブレイブフィニッシュ Tekkyū Bureibu Finisshu?). Kyoryu Red Carnival can use this Zyudenchi to equip the Bunpachy Ball Arm (ブンパッキーボールアーム Bunpakkī Bōru Āmu?) on his left arm for Kung-Fu Carnival.
Behind the scenes
All of the Zyudenryu/Zyudenchi sport a name that is a portmanteau between their effect/motif and their respective animal name, Bunpachy is a portmanteau of Buun (the Japanese onomatopoeiac word for "swishing") and Pachycephelosaurus.
- Bunpachy is the second Pachycephelosaurus-themed mech, with Bachycelonagurus from Bakuryuu Sentai Abaranger being the first.