Dialga has been pretty unforgiving for me. When it first started, me and the raid group here tried beating it a couple times in nasty weather where our fingers were getting chilled to the bone, but always fell short of beating it because of problems, things such as the game not letting me choose a third team to continue fighting it, the game giving someone the infinite GO issue, the Dialga raid ending 5 seconds too early, etc. We get so close, but something goes wrong and we kept failing. Luckily we eventually got like 12 people together to do one and I managed to catch at least one Dialga. Then in trying to do another raid immediately after i kept getting "Network Error" or "Can't Fetch Raid Details" so I missed out on a second Dialga while everyone else got it. I'll try to get more, but at least getting one makes me happy.
I need to get Regice and Registeel from the Research rewards, I also wouldn't mind Ho-oh or Lugia since they can be shiny... Of course I get Entei :/ Reeeeally wish the legendary dogs weren't in here since they've already had guaranteed Research reward encounters and they aren't shiny yet.
My coworker and I hit Best Friends, so we traded my shiny Charmander for his shiny Ivysaur (wish it was Bulbasaur so I can get that for cheap stardust from other people, but oh well), so now I've finally got a shiny Venusaur! On that same day he also found a shiny Pineco which he says he'll trade to me for a Mewtwo. Worth the trade imo since I got a less than stellar Mewtwo I never plan to use. Also traded my shiny Taillow for a shiny Roselia which is one of the two shiny Pokemon currently in the game I would do anything to have, the other being Snorunt.
And now to top it all off, yesterday I found a shiny Eevee on the way home from eating, but it's pretty worthless to me since I've got like 13 of them now. There's so many shinies I need and it gives me one I've got a dozen of. Pokemon GO probably heard my cries of desperation and decided to give me a rare shiny a few hours later! .... A shiny Pinsir.... Which I already had 2 of.... So now I have 3.... Thanks game, I guess? Now currently sitting at 120 shinies.