Probably this items-on match...
I was Sonic, my foe was Ike. Smashville. Last stock, he had 0%, I had 112% or so. I jump under Smashville, and just spam Neutral B to stick to the bottom (it wasn't a serious match, mind you).
Suddenly, a Smash Ball appeared in the middle of the stage! Ike jumped up and hit it with his Up Air.
The Smash Ball promptly flew down beneath the stage, directly in front of me. I hit it with a single Neutral Air, and it breaks. I use it and KO Ike, winning the match.
Next would be... I was trying to make a random fight against a computer (my Ness versus Captain Falcon, Final Destination) into a replay. After fooling around for a bit with PK Fire spams, I have about 30 seconds left to knock off both his stocks. I hit him with PK Fire, use a Down Throw at the edge, jump out and use Down Air, spiking him. He comes down, with about 20 seconds left, and I hit with PK Fire, Down Throw, Forward Air, Neutral Air, then miss a grab. Afterwards, with about 8 seconds left, I roll behind him near the edge and grab, using a Back Throw. 5 seconds left, I jump out and use Down Air, but miss. He then falls under me, and I fastfall doing a Down Air and spike him to his death with 1 second left.
I let out a mighty sigh of relief.