No foraged Rotten Flesh, and no clear immediate source of it. Should Phantump drop it? Shedinja?

Rotten Flesh Drops From:

• Shuppet (wtf is in that puppet sock XD XD XD)
• Zubat
• Noibat
• Trubbish

Rotten Flesh Added To...

• Burmy/Wormadam Trash
• Diglet/Dugrtrio Pink
• Duskull has rare chance
• Venonat
• Drowned Magikarp

None of these corrects for the fact that exactly zero of the Pokemon coming out of the starting spawners give rotten flesh. Leaves will have to do for now.