Short article proposal, as something for the Book of Pocket Monsters.
Basically to add to the bio, will discuss how Umbreon was initially to be a Poison type. This is evident from the recent prototype for Gold and Silver info dump - it was set as Poison type and evolved via a since removed Poison Stone. https://tcrf.net/Proto:Pokémon_Gold_and_Silver/Pokémon Neat aspect is that this is reflected in some dex entries, e.g. “When agitated, this Pokémon protects itself by spraying poisonous sweat from its pores.”
May delve a touch more into what it’s based on while I’m at it I suppose but the above is the main focus.