Peter is one of the two teenagers pulled into the Digital World by Beelzemon. He first meets his partner Betamon when Ronan, himself are pulled into the Digital World. Him and Ronan are the only two digidestined pulled into the digital world by Beelzemon. Peter, Betamon, Ronan and the other digimon,excluding Tsukaimon, free Sean, Diana, Eric and Rachael from ShadowLeomon's prison. Peter is the second digidestined to access his D.N.A. charge and digivolve Betamon to his champion form.
Betamon is one of the digimon Beelzemon frees from the Demon Lords. Betamon first meats Peter when Beelzemon brings him to the digital world. Betamon, Ronan, Peter, and the other digimon partners, excluding Tsukaimon free Sean, Diana, Eric and Rachael from ShadowLeomon's prison. He is the second digimon partner to digivolve to the champion level.
Seadramon is Betamon's Champion form.