So far there are 6 Pastamon you can find within the data pack. Each with their own shinies and animation sets.

Missingno.: Missingno. is found on beaches! so take a relaxing seaside rest for a chance to find this Glitchy Pokemon
Lost Pikachu: Lost Pikachu waits on top of the cold frozen peaks of Cobblemon. Maybe if you make that trecherous climb, you can find yourself a new, slightly mangled friend to join your team!
White Hand: White hand is found roaming the Dark Forests of Cobblemon or strangely within the sealed off and buried Trail Ruins. Go hiking or go excavating and you could find a helping hand to add to your party
Hombone: This Pokemon mysteriously started appearing in and around caves and deserts everywhere! Go spelunking or Duning to find this angry Pokemon!
Hombeast: This Pokemon doesnt seem to appear anywhere... but it seems related to Hombone! Experiment with Hombones moves to see if you can figure out how to get your own Hombeast!
Unown King: Explorers reported seeing a strange three eyed Pokemon wandering the Desert Pyramids and Ancient cities. Maybe look into it and you can find a powerful and mysterious pokemon.

Try Cobblepastas for more Snakewood mons!!