On the Loose and Hyper With Zangoose and Seviper II/VS Zangoose and Seviper II or Determined Pursuer (Japanese: VS ザングース & ハブネーク IIVS Zangoose & Habunake II or 執念の追跡者Determined Pursuer) is the 208th round of the Pokémon Adventures manga.
As the Zangoose and Seviper try to pull their weapons from the screen, the Feebas uses Mirror Coat, which causes the claws and fangs to crack and shatter. In the process, Kiki, Nana, Mumu, and the Swimmer's Staryu are freed from their broken Poké Balls. Ruby and the Swimmer take this chance to try and escape, but continue to be chased by the Zangoose and Seviper.
As Zangoose and Seviper use their non-broken weapons to try and search for Ruby and the Swimmer, but are unable to find them. Inside a building, Ruby and the Swimmer hide from their attackers. Ruby states that they were saved by his PokéNav, but the Swimmer corrects Ruby and states that it was actually the Feebas that saved them.
The Swimmer states that the Feebas has taken a liking to Ruby, hence why it decided to save him. He forces Ruby to keep the Feebas as thanks for what it did, but quickly reveals that he plans to have Ruby breed it so that he can sell them and become rich. As the Swimmer laughs at his plan, Ruby becomes distraught now that half of his team is completely different than what he wanted. Ruby decides to accept keeping the Feebas, but secretly plans to release it later.
Ruby decides to investigate the building they're in, and finds that they entered the Weather Institute, a place rumored to have machines that come alive at night. Mumu suddenly notices Pokéblocks being laid on the ground and he begins following and eating them. Ruby quickly notices that Mumu has disappeared and goes to look for him, finding the Pokéblocks on the ground in the process.
Ruby quickly realizes that the Pokéblocks are similar to ones made by him, but a voice corrects him and states they were made by him. Suddenly, Norman appears behind Ruby and reveals that he can easily read his son's movements. The Swimmer, scared to be alone in the abandoned building, goes to find Ruby again, only to find the boy being thrown into a wall. The Swimmer asks Ruby what is happening, to which Ruby responds that he's about to witness a very violent family quarrel.