I noticed in artwork that the "crown" possibly closes the Slowking face
But this eye.... this colour.... reminds me another Pokémon, that isn't a Shell.
It reminds me Muk. Like a mix of Kantonian Muk and Alolan Muk.
I bet Bede used that coat because he refused to use this uniform
I bet Bede accepted to be trained as a fairy gym leader because the pastel pink/ turquiose was much better than that fashion disaster that is psychic uniform