GO Your "Yes!" moments.

[TeaWest]

I found a 100% level 1 Mudkip that I randomly caught one day.

I mean, it's not exactly a "YES!" moment, but it's still a pretty rare catch.

 

[Zexy]

All the Shinies for a while (most of all the first Zapdos), 96% Zapdos, 98% Snorlax, and most importantly the second Registeel getting caught.

 

[MegaPod]

Spoiler: This.

 

[Zexy]

A pretty nice one recently was when @nmihal traded me a Pidgey and it ended up as a 100% Lucky

 

[Vulpix037]

Tapping on a random Minun and getting a Shiny

 

[MegaPod]

Recently catching an awesome regular Geodude and instantly fully evolving it, plus hatching an Alolan Geodude with 666 CP. Winning a Regirock raid, too.

 

[Zexy]

Got some really big ones yesterday. First a Shiny Houndour, it's been a while since I've got a 1/450 Shiny (Magikarp before Articuno Day).
And a few hours after, same day, that was the big YES, Shiny Snubbull. First time ever I get 2 1/450 Shinies on the same day.

 

[MegaPod]

Won an EX raid and caught Mewtwo.

 

[TeaWest]

Hatching a second Alolan Vulpix Now I'm all done with the Alolan eggs. I just need Marowak now.

 

[omahanime]

I was happy finding 84% 15 attack Larvitar, can you imagine what I was like catching 100% Ho-oh.

 

[TeaWest]

During Moltres day I was able to snag three shinies, as well as a perfect and a 98%

 

[Zexy]

I had a really big YES when I first read the Ultra Bonus announcement

 

[TeaWest]

It only took 4 eggs for me to hatch a Kangaskhan, the last Kano Pokemon I needed!

At laaaassttt

 

[Rocket Zigzagoon]

Hatched a Kangaskhan from a 7km egg today (since she's the one with a Mega Evolution). The only one regional-locked Pokémon I need is Heracross, to further complete my Mega Evolution dex in the future.

 

[PkmnTrainerV]

I had given up any hope to find Ditto, until...

I clicked on one of the Chikorita in the event.
It gave me an 'Error: Pokemon could not be found'
and... it turned into (putting it in spoilers to be on the safer side)

Spoiler: The New 'Glitch Pokemon'

I caught the Nut-like Pokemon and it turned into Ditto! I really like the new Pokemon, specially it’s minuscule overworld model!

 

[MegaPod]

I nailed the excellent curveball for my special task on a random Doduo this morning, which was especially nice since just last night, I tried and failed to do it with my weekly Entei (and caught it in just my second normal Pokéball! A bittersweet “yes” moment in and of itself?).

 

[Iggy]

Did a trade with a colleague today. Let's say it was worth it.

Spoiler

I only had two 77% Mewtwos before this trade.
Some people looked rather funny my way when they heard me scream.

 

[TobíasDML]

I catched a shiny Drowzee yesterday.

 

[Zexy]

Catching a 100% weather boosted Mewtwo was my biggest one for a long while.
Shiny Drowzee and Duskull sure were good too, as was the 96% Lucky Beldum I eventually evolved and maxxed out during CD.

 

[MegaPod]

When I got a shiny Duskull and shiny witch Pikachu a few days ago, plus getting a both lucky and perfect Makuhita, which I have named Buddha.