1x14 - Digimon Tamers

As a strange tiger ultimate level Digimon attacks the tamers begin to fight it. However, when it's too strong for both Rika and Henry, Takato uses the power of the blue card to Digivolve Growlmon into his Ultimate form: WarGrowlmon after a mental conversation with Growlmon where Growlmon informs him he is a worthy to be a Tamer after he doubts himself. WarGrowlmon easily beats and destroys the tiger, Mihiramon. Also, Kazu, Kenta and Jeri witness the battle and are impressed by Takato.