they find one of Kenichi's most significant discoveries: two Invizimals are capable of fighting together as a tag team in combat. While exploring Kenichi's apartment, they find a secret downstairs area that is guarded by a robotic Invizimal Kenichi placed there. After defeating the Kabuto Robo Kenichi placed in his apartment, the trio find the downstairs area, where an enormous vault is found. Inside this vault is the rumored shadow gate, a portal that Kenichi constructed that freely allows him to travel to the Invizimal world. However, a specific plant-based Invizimal named Audrey needs to be found in order to activate the shadow gate. Professor Michaels promptly travels to Thailand, where Audrey can supposedly be found. After traversing various jungles, Michaels and the player eventually find and capture an Audrey, and bring it back to Kenichi's apartment in Kyoto. Once the player clears the cave of the guardians that Kenichi placed there, Michaels places Audrey down near the shadow gate, and the shadow gate activates. The player volunteers to go through the shadow gate and enters The Wave. However, Campbell greets the player as soon as they go through the gate, having set a trap Campbell knew the player would walk into. Campbell reveals that he has created new methods to make Dark Invizimals, and that he is constructing his own army in order to take command of the shadow gate, thus allowing him to rule both the human world and The Wave. Campbell imprisons the player and forces them to fight their way out, as well as acquire and train Dark Invizimals for Campbell's army, which they eventually do. After escaping Campbell's prison, the player successfully finds Kenichi, who is meditating in Bhutanese mountains. Kenichi explains that he's able to travel not just through time, but also travel between the Invizimal world and the real world. Kenichi kept the information hidden from everyone he knew since he was initially unsure about the safety of the shadow gate and living in The Wave. Kenichi reveals to the player that he is aware of Campbell's presence, actions, and negative influence on The Wave. However, Kenichi has learned that Dark Invizimals are not inherently evil, and that they are simply from a different tribe. Kenichi warns that Campbell is approaching his location in an attempt to wrest control of the shadow gate away from Kenichi, and Kenichi tasks the player with combining