Which Pokémon breed and hatch the fastest?

Question

I'm trying to get the IV Checker in Ultra Sun, (Still haven't done that yet...) you need to hatch 20 eggs to get it and I want it to take as minimal time as possible. Thanks in advance!

Comments

A Japanese Caterpie with an English Caterpie that you caught in Ultra Sun/Moon should work.

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You did the thing people despise, you put an answer as a comment. Please stop.

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noo, why didn't I saw this earlyer

Answer 1

Magikarp and Gyrados, has the least amount of egg cycles at 5. That means it will take around 255*5 steps to hatch the egg. If you breed Pokemon with different IDs they should breed faster too.
Scource

Comments

What is "if you breed Pokemon with ids they should breed faster" supposed to mean?

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It means use Pokémon with different trainer IDs. It is just a tad cryptic.

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Pokemon of the same species also breed faster, right?

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I think. I am not the best breeder...

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@sumwun yes they do