What is the relationship between Garamond and Pigumont?

The two are just similar in appearance and have no connection.

Garamon and Pigoumont are obviously different in many ways. Garamon is a robot monster with a serious expression, with a white belly and a height of 40 meters, which can be compared with Altman. Pigoumon is a friendly creature monster, with a more friendly and docile expression, a red belly and a smaller height, only 1 m.