There are a few episodes with both Kaito and Aoko in them:
Magic Kaito: Kid the Phantom Thief (this is a Kaitou Kid special)
Detective Conan: EP 76: Conan vs. Kaitou Kid (1 ঘন্টা Special) EP 219: The Gathering of the Great Detectives! Kudou Shinichi vs. Kaitou Kid (2 ঘন্টা Special) OVA 4: Conan, Kid, and the Crystal Mother