Tyutyumon is an unknown level Digimon that resembles a creepy golden puppet mouse. He also resembles a more intelligent version of Chuumon, Sukamon's partner.
Digimon Xros Wars
After Damemon died in Yuu's hands, Tyutyumon became loyal to DarkKnightmon. He grew bigger and attempted to attack Xros Heart, but Persiamon killed and consumed him.
- Tyutyu Twitter