[Error] Giratina disappears after healing in the poke center (v20.1)

[RJHelen]

I tested what exactly causes this and when Giratina faints and you black out the error doesn't happen. It only happens when you personally talk to the nurse and heal him. upon healing him and pulling up the start menu, I click "Pokemon" and Giratina isn't there. It follows with this error.

[Pokémon Essentials version 20.1]

Exception: RuntimeError
Message: Unknown ID 141.

Backtrace:
GameData:164:in `get'
FormHandlers:264:in `block in <main>'
FormHandlers:31:in `call'
Pokemon:150:in `form'
Species_Files:119:in `icon_filename_from_pokemon'
Pokemon_Sprites:132:in `pokemon='
Pokemon_Sprites:97:in `initialize'
UI_Party:214:in `new'
UI_Party:214:in `initialize'
UI_Party:511:in `new'

If it might help with the problem, In my game there is a dive spot in the map and you fight him while still using Dive and teleport (Not a dive script) to a lake. I went to heal him after I had caught him and that's how I got here. Maybe because I mixed dive with teleporting and not properly diving back up something is happening? I'm not sure
P.S. I am not a good scriptwriter at all. This is my first project.

 

[RJHelen]

Update. It's an Orb/Sprite issue only while inside place that are labeled indoors. It happens in Gyms, Poke marts, Poke centers, etc. and only happens while Giratina is NOT holding the "griseous orb". I still don't understand what would cause this though. is there some sort of indoor and outdoor party sprite for all Pokemon?

Double Update. All of my poke Centers and Poke Marts had :NILL for "Outdoors", "Show Area", and "Bicycle". After changing them to the appropriate Yes and No this crash is no longer happening. This still seems off that it was only happening to Giratina but I don't have to worry about the issue anymore in my game.