I'll start with when I finally caught Tauros in Safari Zone.
When I finished the National Dex in ORAS
Beating Lance in Gold by Mirror Moving his Aerodactyl's Rock Slide.
I put it off forever but in after transferring my living dex into ORAS the only thing left to do was the Maison.
Got all of the Maison trophies. It was a fun using pokemon I normally wouldn't same goes for battle types I would otherwise ignore. Triple and rotation were a great change of pace.
>>26363211
Beating Red in Soul Silver, that was a good fight.
>>26363211
Saturday morning when I caught a shiny Zigzagoon in ORAS AND a shiny Sawsbuck in XY. What a day.
Playing Ruby in the schoolyard. We were down to our last Pokemon - his Rayquaza vs. my Blaziken. Rayquaza used Fly and I expected to lose. So I picked Sky Uppercut, not expecting it to hit. I won the battle and all the other kids watching cheered. It was a lovely surprise.
>>26363211
In one of my playthroughs of Pokemon HeartGold I once caught Entei and Raikou before fighting Morty. I used a level 25 Haunter.
When after trying on and off to get a shiny Latios in AS for about a year, it finally appeared and I caught it with only 3 Premier Balls