When the game first came out I'd invite a group of friends over and play this game a lot.
I quickly adopted Jiggly and after a few weekends I was unstoppable by any of my friends. My strategy was centered around being sneaky with Jiggly's jumps, then spamming d-air, then either up-tilt then throw + whatever aerials I could do, or an up or down smash. Then if my friends started to anticipate that too much, I'd go for the grabs or forward smash. For free for all or teams (we disabled team attack usually) I'd usually pick Yoshi and run around throwing a ****ton of eggs and evading attacks. This of course would be complemented by the most eggselent and eggstremely unclever, poorly eggsecuted egg puns imaginable. My egging on made my friends crack, and my yolks weren't eggsactly eggpreciated. Yoshi soon became eggstinct since my friends were dinosore losers. After my friends banned Yoshi and the eggs made their eggsit I decided I'd try DK, since I thought DK was the worst character and therefore a handicap. I'd repeatedly use DK's taunt whenever I was a safe distance away from other players, and then I'd just use aerials, grab, punch, and donkeynado to win.
We still try to get together and play a few times a year, mostly just as a way to catch up with each other now that we have different jobs, university, etc. Jiggly still wins every time she's used.