Tier 3 appears when one parent's tier was Normal and the other's was lower than Naughty, or if one parent's tier was Naughty and the other's Naughty or Frail.
Tier 4 appears when one parent's tier was Frail and the other's was Frail or Stubborn, or if one parents' tiers was Stubborn and the other's was lower than Normal.
Tier 1 appears when both of the parents' tiers were Serious, or one parent's tier was Serious and the other's was Normal.
Tier 2 appears when one of the parents' tiers was Serious and the other's was lower than Normal, or when one parent's tier was Normal and the other's was Normal or Naughty.
Tier 1: 0-2 mistakes in either physical or mental care from a Tier 1 Kinakomotchi, or 0-1 mistakes in both categories from a first generation Marutchi.
Tier 2: 3+ mistakes in both categories from a Tier 1 Kinakomotchi, 0-2 mistakes in either category from a Tier 2 Kinakomotchi, or 2 mistakes in either category from a first generation Marutchi.
A glitch on the original Plus may cause Marutchi to evolve into Ichigotchi on generations that are multiples of ten.
Tier 3: 3+ mistakes in both categories from a Tier 2 Kinakomotchi, 0-3 mistakes in either category from a Tier 3 Marutchi, or 3 mistakes in either category from a first generation Marutchi.
Tier 4: 4+ mistakes in both categories from a Tier 3 Marutchi, or 4+ mistakes in either category from a first generation Marutchi.
Appears as a marriage partner on the GLAY EXPO limited edition (Japan exclusive).
Deka Tamagotchi Characters[]
The following character data is programmed in to allow the Japanese editions to interact with the first Deka Tamagotchi units. The characters act as Serious adults but also as though they were on the Deka, for instance they sleep from 11 PM to 7 AM. International versions include the character data, but not the Deka functionality.
These characters cannot be obtained legitimately; they can only be accessed if the Tamagotchi is debugged. Because they are chosen as soon as the egg hatches, they do not evolve from or into anything and they can be either gender.