Failing to let your Digimon sleep when the bubble icon appears.

Digimon World Re:Digitize for the PSP, evolution is a complex system based on meeting specific thresholds across several categories, including stats, weight, and behavioral care. Unlike linear RPGs, evolution occurs after a hidden timer expires—typically 3 days for Champion, 4 for Ultimate, and 5 for Mega. Core Evolution Requirements (The Quota System)

To evolve your Digimon in the PSP version of Digimon World Re:Digitize

Digimon World Re Digitize Evolution Guide Psp |verified| ⇒ 〈FULL〉

Failing to let your Digimon sleep when the bubble icon appears.

Digimon World Re:Digitize for the PSP, evolution is a complex system based on meeting specific thresholds across several categories, including stats, weight, and behavioral care. Unlike linear RPGs, evolution occurs after a hidden timer expires—typically 3 days for Champion, 4 for Ultimate, and 5 for Mega. Core Evolution Requirements (The Quota System)

To evolve your Digimon in the PSP version of Digimon World Re:Digitize