Imagery
Moosid (009bjgox)

Icon

Shiny icon

Front

Back

Shiny front

Edit

Shiny back

Edit

Overworld

Shiny overworld

Edit
Sprite credit
Front sprite and gen4 style back sprite by PansyGum
Overworld Sprite by WolfPP
Back by Plouton

WolfPP, Travis, Wednesday, and many others on the PokeCommunity Discord provided sprite feedback.