How to Install and Activate the Trainer Textures Pack
Getting the Pack Loaded
This is a resource pack, not a mod, so it goes in your resource packs folder rather than your mods folder. Drop the pack file into the resourcepacks directory inside your Minecraft instance, then launch the game and open Options → Resource Packs. Move the pack from the left column to the right column so it sits above the default assets. If you also run other packs that touch trainer models or textures, place this one higher in the list so its 180+ skins win the conflict.
Confirming It Works
Start a world that already contains Radical Cobblemon Trainers NPCs. Walk up to any trainer and check whether their outfit has changed. Gym leaders like Brock and Red should now show their signature looks instead of the default model. If nothing changes, the pack is either disabled or being overridden by a lower-priority pack.
If Textures Look Wrong
Missing or purple-and-black textures usually mean another pack is overwriting the same files. Disable competing packs one at a time to find the culprit. Remember that this pack only repaints existing trainers — it does not spawn new NPCs, so you still need the base trainer mod generating opponents in your world for the skins to appear on anything.