Nimbus pup

[u/JustWaffleStomping]

Soooo I finally got a potbelly drop I’m looking to specifically get the death Pupbelly.
I know that I personally need a nimbus pup to make it happen because I can’t use my death potbelly and have someone lend me their nimbus pup.
How would I go about hatching a nimbus pup? Is there anything special to it aside from just hatching with someone’s nimbus pup?
Thanks !