Dr. Lavaさんのイラストまとめ

Beta Quagsire:

In Gold & Silver's 1997 demo, Quagsire was originally an unevolved pure Water-type. But Quagsire ended up getting revised to Water/Ground, and given Wooper as a pre-evolution.

1. Demo sprite recreation by @RacieBeep
2. G&S 1997 demo sprite
3. 1999's final design

(2/4) Bomushikā translates to "bomb sea lion," so he's sometimes referred to by his unofficial English name "Bombseal."

After Bomushikā was scrapped from Gen 2, the series didn't get a Water/Fire Pokemon until Volcanion in Gen 6 (who's actually classified as Fire/Water type).

Lost Pokemon of the Day: Bomushikā

First revealed when Gold & Silver's 1997 demo leaked in 2018, Bomushikā was a sea lion Pokemon, and if he'd made the final cut, would have been the series' first Water/Fire type.

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Beta Igglybuff:

In Gold & SIlver's 1997 demo, Igglybuff evolved into Jigglypuff at level 12. But his design was later revised for G&S's final build, and changed to evolve via high friendship.

1. Demo sprite recreation by @RacieBeep
2. G&S 1997 demo sprite
3. 1999's final design

Lost Pokemon of the Day: Shibirefugu

First revealed when Gold & Silver's 1997 demo leaked in 2018, Shibirefugu was a puffer fish Pokemon who was originally planned to evolve from Qwilfish at level 18.

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Lost Pokemon of the Day: Gyaoon

First officially revealed in the 2018 Japan-exclusive manga, "Satoshi Tajiri: the Man Who Created Pokemon," Gyaoon was one of the very first Pokemon ever created.

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Slowbro's 30th Birthday:

Appearing in the earliest Pokemon concept art, Slowbro is one of the oldest Pokemon in the entire series. He's much older than Slowpoke, and even Pikachu -- in fact, he just turned 30.

1. 1990 concept art
2. Gen 1 beta sprite
3. First released artwork

Lost Pokemon of the Day: Pudi

First revealed when Gold & Silver's 1997 demo leaked in 2018, Pudi was originally planned as the baby stage of the Growlithe family. In Japanese, Pudi's name means "Petit Growlithe."

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Beta Donphan:

In Gold & Silver's 1997 demo, Donphan was originally brown. But when he made his official debut in Pokemon: The First Movie eight months later, he'd been changed to green & grey.

1. Demo sprite recreation by @RacieBeep
2. 1997 demo sprite
3. Final official artwork

The First Pokemon:

Ken Sugimori has said that Rhydon, Lapras, and Clefairy were the earliest Pokemon ever created. And since Rhydon has an internal ID number of #1, he was almost certainly the very first Pokemon.

1. 1990 concept art
2. Gen 1 beta sprite
3. First release artwork