Of course when I don't check for a few days I get a question! lol

Uh... first thing that comes to mind is a match I had during one of the online VGC events during pokemon gen 5. I predicted my opponent and turned a match around that caused them to rage quit.

We were both down to our last pokemon, mine were Cofagrigus and Thundurus, theirs were also Thundurus and a fresh Conkeldurr. My Thundurus was in the red so I figured they'd try and have Conkeldurr pick it off with bullet punch next turn. I was packing disable on cofagrigus, so I had my thundurus use protect and targeted the conkeldurr with disable. Got the prediction right and managed to disable their bullet punch. That made sure my thundurus could get off and attack next turn, so both Thunduruses(?) went down, leaving Cofagrigus vs Conkeldurr. The only thing Conkeldurr could do was hope they could get a critical hit with stone edge so Cofagrigus won by stalling and chipping their health away lol.

I wanted to save the replay but the other person rage quit and it wouldn't let you save replays when that happened. But I'll always remember.