Chuchu/History/GSC

Chuchu was about three years after 's first appearance in the. In Tyranitar War, Yellow mentions that she found Chuchu injured in Viridian Forest and took her in. After introducing her to her uncle Wilton, he notes that Chuchu had grown quite attached to her and expounded on his real objective, which was to ask Yellow to go to the Johto region with him to investigate about. Because the sheer magnitude of a monster that they are dealing with does not leave him with many options alone, he needed someone to go with him, and Yellow came up with the idea to ask. After Yellow found him training near Viridian Forest, Chuchu seemed to take a liking to Pika soon after they met. However, with Red's wrists and ankles still weak from the damage that Lorelei's ice cuffs left on them, he needed to recover at the hot springs of Mt. Silver, and left Pika behind. Alongside Pika and Yellow, Chuchu flew to Johto on Kitty with Wilton's.

In Do-Si-Do with Dodrio, they encountered after the latter mistook Pika for a wild Pokémon. Soon, however, the two s got involved in Lugia's rampage and lost consciousness in the shipwreck.

Following the incident, Chuchu and Pika produced an in Playful Porygon2 when Pika spent time with her in the Johto Day-Care Center. When some Team Rocket members attacked the Day-Care Center, Chuchu, in a desperate attempt to protect her egg, flew, with the help of balloons, carrying Pika and their Egg. When the Masked Man took the three hostage near Ilex Forest, embraced their Egg and took a number of blows to guard it, hatching the  that the Egg contained. With Pichu's assistance, the boy eventually succeeded in defeating the villain, and Chuchu's offspring was left in his care.