Credit goes to YEYP

Seth one of the few cold hearted pokemon that can still pull off looking good in pink diapers (thanks to his lover Alice). Even though many of his line either detest him or after his head, there is a tiny group of newborn treecko who don't know about his actions. Looks like Seth bonding with one of two treecko who were out to get him at first, but eventually warmed up to him.
Looks like that Treecko wants to look good in pink diapers as well, but no one pulls it off better than Seth even other small pink mythical find him attractive given not many stone cold pokemon still look good in pink diapers.

End

Seth belongs to Me
Pokemon belong to Game Freak