I think these were old prototypes from when monster high was first

Barbie Has a New Body Cover Story

i tried to do a what if the prototype monster high characters were drawn in the official art style 😁(pls no stealing) : r/MonsterHigh

Monster High Prototypes

The Point of 'Saltburn' Isn't What You Think It Is - The New York Times

Monster High Prototypes

S.T.A.L.K.E.R. The Board Game by Awaken Realms - Pre-campaign update #3 / Photos of the prototype, first S.T.A.L.K.E.R. dev diary, and the campaign start date! - Gamefound

GM to fit monster e-drive mining truck with hydrogen power cubes

First Drive: This Porsche 911 Restomod Turned the Classic Ride Into a Supercharged Grand Tourer

Monster High - Wikipedia

The 200 Best Horror Movies of All Time

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Monster High Deals

Monster High Dolls by Mattel