So I was reading through the entire etymology list and saw a few things I thought were missing. Sorry if it's too long, but if you don't want to read the whole thing, just scroll all the way down because the Dudunsparce one is very important.
Pidgeotto: -otto- -otto is an Italian diminutive suffix that is usually used to describe young animals. Pidgeotto can be considered a “young” version of Pidgeot.
Pidgeot: jet- Pidgeot’s Yellow entry says: “This Pokémon flies at Mach 2 speed, seeking prey. Its large talons are feared as wicked weapons.” It flies really fast, like a jet.
Rattata: attack- Mainly because Raticate has “eradicate” in it’s name, and that “attack” is like a weaker version of “eradicate”.
Wigglytuff: tuft- Like a tuft of fur.
Typo on Oddish?- Just found it odd that “Odd” is capitalized in Oddish’ etymology. No big deal, though.
Porygon: origami?- I’ve heard that Porygon is “polygon”+”origami” because it sorta looks like an origami crane, but the resemblance is pretty loose, and the only evidence in the name is the letter r, so, not sure.
Natu: native/nature?- “Native” as in “Native American”, and I feel like nature might be in there somewhere, but I can’t really explain my thought process and the connection.
Xatu: xat- A xat is “A carved pole erected as a memorial to the dead by some Native Americans of Western North America.” as described by Wiktionary.
Mareep: ampere (anagram)- An ampere is an electrical unit and an anagram for Mareep.
Murkrow: murk- I know “murky” is on there already, but “murk” just feels like something a mafia boss like Honckrow would say. I could see Honchkrow going “Murk ‘em, boys.”
Piloswine: pile/pile o’- It’s a pile o’ swine!
Wurmple: NOT apple- I mean, Wurmple’s red, but it doesn’t really have anything to do with apples. Maybe it’s “rumple”, because it’s spiky?
Definition on Sableye: sable- A sable is also a type of opal, which makes more sense for a creature with gemstone eyes than a weasel.
Bibarel: bib- Bibarel looks like it has a bib because it eats lots of wood.
Cottonee: teeny- Cottonee is very small.
Vanillite: lite/light- It’s a small ice cream cone, so it’s a “lite” version. You know, like Coke Lite.
Heatmor: eat more- Heatmor is probably a combination of “heat” and “eat more”, not just “heat more”. Most of Heatmor‘s names in other languages also involve something about being hungry.
Definition on Cobalion, Terrakion, Virizion: lion- I think the definition of “lion” on their etymology should be changed to “as in heart of a lion”. The Swords of Justice are brave, but not actual lions.
Skrelp: scrawny- Skrelp is small and sickly looking.
Sliggoo: slug- Yeah, it’s got a shell, but it’s not a real shell, and it loses it immediately.
Bergmite: -mite- Bergmite is also very small.
Avalugg: lug- Avalugg often carries Bergmite on it’s back, even though it’s not exactly lugging them.
Hoopa: hoopla- Hoopa gets excited about making mischief. The guy is hoopla.
Volcanion: NOT lion- That is not a lion. I’m pretty sure it’s “volcano+canyon”.
Salazzle: sizzle- ‘Cause it’s a Fire type.
Stufful: stuffing, full- It’s a stuffed animal. It’s full of stuffing.
Tsareena: mangosteen- Tsareena is still a mangosteen.
Mimikyu: Pikachu- Should be self-explanatory.
Kartana: card/cardboard- Kartana is really tough paper.
Magearna: nanny?- Magearna is a caretaker, but the only evidence in the name is the “na”.
Definition on Inteleon: Intelligence- Intelligence is also the information that spies collect.
Applin: in- It’s in an apple.
Grimmsnarl: Grimm’s Fairy Tales- Considering Grimmsnarl has two m's.
Zacian, Zamazenta: the- In true legend fashion, people could only catch glimpses or blurs from these guys, so they just called them The Cyan and The Magenta.
Quaquaval: aqua- Look closer at Quaquaval’s name.
Arboliva: arbol- “Arbol” is Spanish for “tree”.
Wugtrio: wug- A wug in cryptozoology is a worm/bug-like creature. Even though…
Wiglett/Wugtrio: water- …the “w” in their names stands for “water”. Like, their Japanese names translate to “sea Diglett” and “sea Dugtrio”.
Dudunsparce: du-dun-ssh (rimshot onomatopoeia)- This is it. The whole reason I made an account or this list. Dudunsparce is not only a repetition of “Dunsparce”, it’s name also as a rimshot in it. Because it’s a joke. A joke evolution of a Jokémon based on a jokai. A joke 24 years in the making. Ever since Dunsparce was introduced, people wanted it to evolve, and we got literally more Dunsparce with a rimshot perfectly snuck into it’s name. Beautiful.
Gholdengo: tengo- “Tengo” is Spanish for “I have”. Gholdengo isn’t going “gimme, gimme” anymore because it has all it wants.