Oh my Iron Ball Ambipom? :o
Fling Iron Ball Ambipom sounds so familiar... (checks Battle Tree movesets from USUM)
Ah, no wonder Fling Iron Ball Ambipom sounds familiar. There are two Fling Ambipom sets in the Battle Tree, but they hold King's Rock instead of Iron Ball. There's one Fling Ambipom I didn't like of those two: one of them has Payback, of all moves Payback. (confused on why Ambipom can learn Payback except for being on a Trick Room team but it's too fast outside of Trick Room.)
https://m.bulbapedia.bulbagarden.net/wiki/Battle_Tree/Pok%C3%A9mon_(252-471)#424:_Ambipom
I'm pretty sure there are some sets similar to the ones you made when you first started competitve.
Also, I created really bad Gen 3 sets, but this was when I didn't play competitively, and I would write the movesets down. One I remember the most is Gengar with Toxic, Confuse Ray, Double Team, and Protect.