to enter the real world to kill the 8th DigiDestined member. The DigiDestined follow after Myotismon’s forces to their home of Odaiba, with the 8th child revealed to be Tai's younger sister, Kari and that Myotismon’s lieutenant Gatomon is her Digimon partner. Following a series of battles, Agumon and Gabumon are able to finally defeat Myotismon with their Mega forms they gained through Warp Digivolution. When the boundaries between the human and Digital Worlds begin to intersect, the DigiDestined return to the Digital World to face the Dark Masters, a quartet of mega-level Digimon who each took control of a part of the Digital World. In the midst of their battles, they learn that they were chosen to save the human and Digital Worlds from intersecting four years ago. But tension leads to infighting within the group and causes them to temporarily separate. After reflecting, the DigiDestined reunite to defeat Piedmon, the last Dark Master, and confront Apocalymon, who attempts to destroy both worlds. Apocalymon destroys their Crests, but the DigiDestined realize the power of their Crests were inside them all along and manage to defeat him. With the Digital World restored, Tai and his friends leave their Digimon partners behind and return to their normal lives. Development In 1999, a short film based on the virtual pets called Digimon Adventure was released. However, shortly after the film's storyboard was completed in 1998, producers at Toei Animation were requested to turn it into a television series. The DigiDestined's character designs were created by Katsuyoshi Nakatsuru. The staff had decided to name the characters based on kanji that related to luck. Media Anime Digimon Adventure was produced by Toei Animation and ran for 54 episodes on Fuji TV between March 7, 1999, and March 26, 2000. The main opening theme for all episodes aired in Japan is "Butter-Fly" by Kōji Wada, which peaked at #47 on the Oricon Weekly Singles Chart. "I Wish" by AiM is used as the ending theme from episodes 1–26, while "Keep On", AiM's 5th single, served as the ending theme from episodes 27–54. The series also uses three insert songs: "Brave Heart" by Ayumi Miyazaki as the Digivolution theme, "Seven" by Kōji Wada, and by Toshiko Fujita, Tai's voice actress. On August 1, 2014, during the series' 15th anniversary, a Blu-ray Disc box of the original series was announced and set for release in Japan on