inspired by this: https://community.cbr.com/showthread...man-can-defeat
let's assume that the Digimon have no Partners, so no assistance from their human partners, the Digimon in question aren't needed to be ones that partnered with Digidestined(of any season). any version that aren't Extremis-powered one for Ironman(with his standard gear) are preferred
alternatively what's the weakest Digimon that can take down Ironman
note: the Digimon in question are preferably ones from first 2 seasons(and it's sequels), speaking of universe where Digimons here are came from