#honestly the entire Phascomon to Belphemon line is pretty interesting if you look into each digimon

[r0bita]

The more I think about it, Porcupamon digivolving into Astamon makes for an interesting "rags-to-riches" story.

Porcupamon - Very unlucky digimon who have to resort to wearing patchwork teddybear costumes to avoid being hunted to extinction. Was pushed into the Dark Area (probably for being too stabby and pokey) so they were not put there by choice.

Astamon - Arguably one of the most beloved and respected digimon in the Dark Area due to their charismatic personality. Very protective of their companions. Probably runs a powerful syndicate, if not an entire army of demons. Is basically royalty.