He is voiced voice by Brianne Siddall for Adventure and Peggy O'Neal also voices Yakumo Tatsuro for Digimon: The Movie & Adventure 02.
Digimon: The Movie
Four years before the original seven children's transportation into the DigiWorld, a Digi-Egg emerged from the Kamiya's computer, and hatched into a Botamon the next morning. Kari Kamiya managed to communicate musically with the Botamon using her whistle, and it accepted them as friends. After eating a bunch of candy bars, it Digivolved into a Koromon.
The Dark Masters attack the facility where he is housed, and Gennai flees with the eggs in hand. He is taken to File Island, where he hatches into Botamon who eventually digivolves into Koromon.
Digimon Adventure tri.
Meiko unlocks the sealed memories inside Meicoomon, restoring the lost memories. Agumon remember his first meet as Botamon with younger Tai & Kari.