Professor Sada first contacts the player when they enter the Naranja Academy for the first time, asking them to take care of the Koraidon that was once under her possession. Throughout the game, she frequently contacts the player as Koraidon gradually regains the powers it once lost. Once Koraidon is fully powered, Sada asks the player to travel to her laboratory at the Great Crater of Paldea. As the player, Nemona, Arven, and Penny traverse the area to reach Sada's laboratory, the Professor reveals that she succeeded in creating a time machine, which has brought Pokémon known as Paradox Pokémon from the distant past into modern time, including two specimens of Koraidon.
At the Zero Lab, the player discovers that the Professor Sada they've been talking with has actually been a robot the whole time, infused with an artificial intelligence copy of the real Professor, who passed away when she was attacked by one of the Paradox Pokémon. While the original Professor Sada wished to let Pokémon of the past keep entering the modern day through the time machine, the AI refuses to let the Paldea region's ecosystem be ruined by these time-displaced Pokémon and asks for the player's help in shutting down the time machine. The AI is, however, programmed to protect the time machine, so the player is forced to battle it and the Paradox Pokémon it wields against the AI's will.
After the AI is defeated, the security system seals all Poké Balls not labeled with Sada's ID, forcing the player to confront the AI's Koraidon with the one they've spent the entire game with. Once the opposing Koraidon has been defeated, AI Sada understands that the time machine cannot be shut down as long as it remains present to reboot the system, so it chooses to travel to the distant past its creator had hoped to see, bidding farewell to the player and their friends as it disappears into the time machine.
Pokémon
Sada's Pokémon are contained in Master Balls.
First battle
Second battle
Formerly owned