Chi-Tan

Chi-Tan is the baby brother and youngest sibling of Cobalt, Astro, and Uran. He travels to the Pokemon world with Cobalt to find Astro and Uran and bring them home. Team Rocket captured him, Cobalt, and Uran as a plot to get Astro to steal Ash's Pikachu, but they were rescued by Astro, Ash, Cilan, Iris, Clemont, Bonnie, and Serena.