The Eighth Child Revealed Digimon: Digital Monsters : Season 1 Episode 34

With Wizardmon's help, Gatomon discovers that Kari is the eighth child and she is her partner. Entrusting Kari's Digivice to Tai, Wizardmon and Gatomon infiltrate Myotismon's lair to steal the Crest of Light. Myotismon catches them in the process and discovers the truth as well, throwing Wizardmon into the ocean while holding Gatomon captive.