@Shin_Aniki

People probably hate Zygardes shiny due to the arduous hunting process rather than the straight up colors.

@StarryThey-os

I kinda like Tinkatons just for the implication that the only reason its a shiny is because it committed itself to hunting shiny corviknights specfically. The level of dedication and spite is very funny to me.

@SuperGreenLuigi

Here's the worse shiny we all can agree on... Gimmighoul and Gholdengo

@ShadowJCreed

Komala is basically just like Tinkaton, it's little tree drum becomes pink instead of brown but the actual koala has no differences

@LuxAcePlays

I kinda wish Tinkaton had Corviknight's color scheme as its shiny. It'd look pretty cool.

@VGBrothers

Yeah, the Tinkatink line and Komala are the first ones that come to my mind when it comes to missed shiny opportunities specifically. 
I don't really know what Komala's shiny could reference, but the Tink line referencing Iron Age and Bronze Age is a neat touch (even if bronze is weaker compared to iron). 
Having the body color change from bright pink to either a gunmetal gray or oceanic blue would have made an amazing parallel to the superstition of "metal gremlins" or "aircraft gremlins" that popped up during World War 2 in an attempt to explain sudden mechanical failures in aircraft in-flight, which still integrates it with the dex entries about Corviknights being targets of Tinkaton.

@LiamTabone-x8g

Tynamo.... Pain

@Roseberry606

The whole charcadet line 😭 so much wasted potential

@beast_killer5372

tinkaton's shiny just means she murdered a shiny corviknight which is cool, but yeah the main body needs to change as well

@portiam9541

Gimmighould and Gholdengo for sure. That hard to get a shiny and it looks almost exactly the same

@sirknight69

omg the charkadet line easilly has the WORST shinies out of any pokemon ever...like objectively. The only thing that changes is their EYES

@MaxDuncan-j1i

Hearing toothpaste dog changes everything, it’s amazing with no more than a new name 😂

@ChikuTenebresRattus

Leafeon
Challenge, don't make it Fall-themed

@pkl0025

My least favorite shiny used to be Regice. It doesn't change pretty much at all, and the only reason for this is because from gen 5 on the sprite for regular Regice was changed to be almost identical to the shiny; in gens 3 and 4 it's actually a good bit more noticable, and that just made modern shiny Regice even worse...

And then Ceruledge came out.

@Cutieplier1995

Dude the flabebe event was A PAIN

@nfortyeight

I don’t support the idea of attacking people online, but I’ll make an exception for the “Zygarde” fellow

@Umbrellie_

Lets be honest. We all hate the ones that barely change at all. Gengar (Not counting Mega/Giganta), Garchomp, Charcadet, etc...

But the ones I hate the most that DO actually change, are all the dehydrated-pee green coloured shinies.

At least the pink ones are usually vibrant and flamboyant. Meanwhile, the yellow-green just looks like they've grown mould in the amount of time they've overstayed their welcome.

@Mystmon

The Charcadet line. They should be teal to represent Kitakami/The Teal Mask.

And before I get any replies that say, 'BuT MyStMoN, tHe ChArCaDeT lInE hAs NoThInG tO dO wItH tHe DLC, sO tEaL dOeSn'T wOrK', literally anything works when the real thing is just 'swap the eyes'.

@anyathepanther7977

Im with her on all the takes. An orange Tinkaton would improve it sooooooo much!

@guy_from_the_basment

For tinkatin, you could make the hammer the colour of corviknights shiny and then make tikaton itself an emerald green to contrast the silver