A deer pokémon was planned to be in the first generation. It seems like an early version of Stantler.

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Haneko, Poponeko and Wataneko (Hoppip, Skiploom, Jumpluff). This is the evolutive line from beta version hoppip.

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Beta Furret, the only changes between the original pokemon prototype and the final version are its colors and his tail which is not attached in its body.

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No name Viking Ship (?) Beta Pokémon sketch I did last night <3

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This is an older beta pokemon, from the red/green prerelease, which got revised into scyther. I call this version scython.

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Another beta pokemon sprite, this time: the terrifying nightmare bone monster... I can see why they dropped him... I call him Bonemaw

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Here is my 3rd beta pokemon sprite interpretation, this time i think it's beta sunkern? Hard to tell without names or order. At the very least it's a better sunkern. I call him sunspore.

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