What are all of the Pokémon whose number of abilities decrease when they evolve?

If you didn’t understand the question, here is a example: Trapinch has Hyper Cutter, Arena Trap and Sheer Force as its abilities, so 3 in total. However, when it evolves into Vibrava, it only has Levitate, so the amount of abilities it has goes from 3 to 1. Also, don’t include mega evolutions since pretty much every one of them falls under this criteria. So, is it just Trapinch or are there others?

Pleaselog inorregisterto add a comment.

I’m going to be splitting these into three categories.

Lose an ability slot but gets it back once it evolves.These are going to be your cocoon Pokemon.

Caterpie and Weedle both lose their HA’s when evolving into Metapod and Kakuna respectively, in which they get Shed Skin. Their HA’s return when they evolve into their final forms.

Spewpa actually keeps it’s HA, it just temporarily loses Compound Eyes until it evolves again.

Pokemon that just flat out lose an ability.

Pikachu into Alolan Raichu, as the Pancake Rat only has Surge Surfer.

Snorunt goes from 3 to 2 when it evolves into Froslass.

Special category.This is mostly speculation.

Now look I know Shedinja doesn’t evolve from Nincada, but you obtain it by evolving Nincada, idk. Anyways Shedinja only has Wonder Guard while Nincada has 2 abilities.

Anyways, I hoped this helps. My source is scrolling through all the pages on the DB and looking at the abilities. It was quite fast to do, since I was on a computer, but yeah. Hopefully, there aren’t any missing or additional abilities that the God llama (Pokemaster) never bothered to fix, but if there are, feel free to correct me.

Ok I need sleep now bye!