When are all the times a gender ratio changes based on Form or Evolution?

Question

Example of Form: Ash-Greninja
Example of Evolution: Azurill to Marill

Answer 1

Evolution:

Combee 87.5/12.5
Vespiquen 0/100
Salandit 87.5/12.5
Salazzle 0/100
Burmy 50/50
Wormadam 0/100
Mothim 100/0
Snorunt 50/50
Froslass 0/100
Azurill 25/75
Marill 50/50
Kirlia 50/50
Gallade 100/0

As you can see, all but one of these is a Gender exclusive evolution.

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Btw it is possible in Swsh to turn a male Salandit/Combee into a Salazzle/Vespiquen, but the game is hardwired to make Salazzle/Vespiquen always female, so the end result will be a gender swap.

As for form changes, Ash Greninja's gender ratio doesn't actually change, it's just that the only one in the whole series is locked to be Male, (probably because Ash's Greninja is a dude.) No other Pokemons form change causes a gender ratio change. Also, most of the Pokemon who have different forms are legendaries who don't have genders usually.

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Comments

Gallade is missing inthe list

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No it not

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Meowstic's and Indeedee's different forms have different gender ratios.

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They have a different form based on their gender, I don't think that counts as a gender ratio difference. Both Indeedee and Meowstic have 50/50 gender ratios with a different form for each gender.

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Sorry I didn't see this till now, here 'ya go.