[1.6] Add-on Pokemon do not show in custom dex regions

Summary

When custom pokemon are added to a custom dex file the region shows in game but the pokemon in the list do not.

Steps to reproduce

Create a datapack with a custom dex file that lists at least one custom pokemon added via datapack. Load up a world and navigate to the new region in the pokedex.

What is the current bug behavior?

The custom region shows correctly and can be navigated to, but the custom pokemon listed in the dex file do not show and the dex shows as blank.

What is the expected correct behavior?

The custom region shows correctly and can be navigated to, and the custom pokemon display as any vanilla pokemon would in the pokedex.

Cobblemon Version and Mod Loader

Fabric Snapshot Version: fabric-1.6.0+1.21.1-20241024.233204-95

Mods used besides Cobblemon

Issue occurs with clean Cobblemon instance