Which Pokemon originally couldn't evolve/only had 1 evolution?

Question

I'm trying to find a list of Pokemon that couldn't evolve when they were first introduced but got an evolution in a later generation, like Scyther and Sneasel. I'm also trying to find a list of Pokemon that couldn't evolve before but got another evolution in another generation, like Magneton. A list would be greatly appreciated :)

Comments

Are you looking for all the evolutions of pokemon who originally didn't have one, or just all cross-generational evolutions in general?

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"I'm trying to find a list of Pokemon that couldn't evolve when they were first introduced but got an evolution in a later generation, like Scyther and Sneasel."
I guess they meant cross-generational evolutions.

Answer 1

List of Pokemon that couldn't evolve but got in another generation:

• Onix (Gen 1) --> Steelix (Gen 2)
• Lickitung (Gen 1) --> Lickilicky (Gen 4)
• Tangela (Gen 1) --> Tangrowth (Gen 4)
• Scyther (Gen 1) --> Scizor (Gen 2)
• Electabuzz (Gen 1) --> Electivire (Gen 4)
• Magmar (Gen 1) --> Magmortar (Gen 4)
• Porygon (Gen 1) --> Porygon2 (Gen 2) --> Porygon-Z (Gen 4)
• Aipom (Gen 2) --> Ambipom (Gen 4)
• Yanma (Gen 2) --> Yanmega (Gen 4)
• Murkrow (Gen 2) --> Honchkrow (Gen 4)
• Misdreavus (Gen 2) --> Mismagius (Gen 4)
• Gilgar (Gen 2) --> Gliscor (Gen 4)
• Sneasel (Gen 2) --> Weavile (Gen 4)
• Nosepass (Gen 3) --> Probopass (Gen 4)
• Roselia (Gen 3) --> Roserade (Gen 4)

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List of Pokemon that got an evolution in another generation:

• Pikachu (Gen 1) --> Alolan Raichu (Gen 7)
• Golbat (Gen 1) --> Crobat (Gen 2)
• Gloom (Gen 1) --> Bellossom (Gen 2)
• Poliwhirl (Gen 1) --> Politoed (Gen 2)
• Slowpoke (Gen 1) --> Slowking (Gen 2)
• Magneton (Gen 1) --> Magnezone (Gen 4)
• Exeggcute (Gen 1) --> Exeggutor (Gen 7)
• Cubone (Gen 1) --> Alolan Marowak (Gen 7)
• Koffing (Gen 1) --> Galarian Weezing (Gen 8)
• Rhydon (Gen 1) --> Rhyperior (Gen 4)
• Chansey (Gen 1) --> Blissey (Gen 2)
• Seadra (Gen 1) --> Kingdra (Gen 2)
• Mime Jr. (Gen 4) --> Galarian Mr. Mime (Gen 8)
• Eevee (Gen 1) --> Espeon, Umbreon (Gen 2), Leafeon, Glaceon (Gen 4), Sylveon (Gen 6)
• Togetic (Gen 2) --> Togekiss (Gen 4)
• Piloswine (Gen 2) --> Mamoswine (Gen 4)
• Kirlia (Gen 2) --> Gallade (Gen 4)
• Dusclops (Gen 3) --> Dusknoir (Gen 4)
• Snorunt (Gen 3) --> Froslass (Gen 4)

Source

That's all I could find. Comment if anything is missing. Hope this helps!

Comments

Wasn’t Pory2 in Gen 2? Ig it’s Gen No. is missing.

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I think you forgot Chansey for Gen 1.

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Thanks—I included Chansey in another section because it already has a pre-evolution (Happiny).

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Thanks for answering the question! Selected and upvoted :)

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Sylveon... in gen 8? Pretty sure you meant gen 6

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Fixed! (filler)

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sniped by a few seconds PandaMech, I was gonna say that lol