Karakuri Island

When Vegapunk lived on the island in his youth, he created a laboratory that housed many experiments, most of which were never finished. His lab and everything inside is considered a treasure of mankind and is more valuable than money, guarded by the Marines. Vegapunk modified the local animals into cyborgs, such as beetles, lions, gorillas, and snakes to use as a labor force to build an in-ground heating system for the island’s people. He was never able to finish it due to his young age as well as a lack of the skills and funding necessary to make it a reality. It is visible from the island as two giant bolts lodged in the mountain. Because of this, the people found his kindness to be all the warmth they need. At some point, Dr. Tsukimi built his own automata, Spacey, Cosmo, Galaxy, and Macro, while living on Karakuri Island. The five were enjoying dumplings while watching the moon. When part of it blew up, Tsukimi died and was buried by his automata there, and the four of them traveled to the moon vowing to avenge their fallen creator. Bartholomew Kuma visited the island during his journey to find a cure for his daughter, Jewelry Bonney.

Summit War Saga

Amazon Lily Arc

Franky was sent here by Bartholomew Kuma during the incident at the Sabaody Archipelago. While exploring the island, he reached Vegapunk’s old home. The only residents known by name as of now are Kitton and Taroimo.

Post-war Arc

When Franky broke into the lab, he found the lab’s self-destruct button and mistook it for a pirate symbol and pushed it. The lab and unfinished heating system promptly exploded in a giant mushroom cloud as a result. This incident would later be referred to by the rest of the world as the “Nightmare of Baldimore”. This was later shown to have destroyed the skinny mountain with the two bolts sticking out of it. After Franky escaped from the explosion, which burned off the skin on his face, he went into another portion of Vegapunk’s laboratory revealed by the explosion, which was intact and contained many weapons-based inventions. He decided to live there to get stronger under Luffy’s orders. Franky donned a tiger rug to cover his disfigured face, but accidentally set it on fire when embers from the nearby furnace landed on it. He ran out into the open area screaming. This gave him the appearance of a burning beast which the Marines investigating the earlier explosion saw, leading to another incident: the “Legend of the Sacred Burning Beast of Baldimore”, which would be passed down through the Grand Line for generations.

Final Saga

Egghead Arc

The population of Karakuri Island was later listening to Vegapunk’s broadcast, with them talking about Vegapunk and him being born on Karakuri Island, while one citizen clarified Vegapunk was not the “Nightmare of Baldimore”, and Kitton’s grandfather mentioning he hadn’t seen Vegapunk in decades.