Evolution Power Up Tiers - Digimon: The Movie

A battle dictated by which tier the monsters are in. Agumon and Tentomon (rookie) evolve one level into Greymon and Kabuterimon (champion) to take down Keramon (rookie). Keramon responds by going up two levels to Infermon (skipping champion into ultimate level), forcing the others to try to reach their ultimate level forms, but they take too much damage and revert back to rookie.

Example of:
Evolution Power-Up