Relemon

A mystical Digimon said to be born only on moonlit nights. A Relemon born under the full moon is said to receive its magic power, and will grow into a Digimon with above-average abilities that can use mysterious arts. A nocturnal creature, its shy personality prevents it from appearing in front of people often. Relemon cannot attack, but it can transform into anything of a similar size to itself as a form of protection. It cannot hide its tail, however, and therefore it is always found out.