Digimon Adventure

The group is attacked by a Kuwagamon and Tai fails to digivolve Agumon. Piximon intervenes and saves them. He then offers the group training at his facility, and leads Agumon and Tai into a cave while the others stay outside. When Matt finds his Crest of Friendship and Izzy finds his Crest of Knowledge, they are spotted and attacked by Tyrannomon. Tai and Agumon reappear just in time to defeat Tyrannomon.