User blog comment:Danny828/Strongest Digimon/@comment-67.166.181.97-20121110004852

The problem with labeling any one digimon as the strongest is that the various media's they may show up in can disregard what one has previously established.

Apocalymon was the strongest contender for that role for the first few seasons, given his last attack. Then we had Lucemon show up, obliterating foes well above his level grade. Now Shoutmon X7 Superior Mode. ZeedMillenniummon appeared in the games as a being that was nigh-invincible unless faced by Ryo. UlforceVeedramon Future mode in one of the manga's.

It all depends on the setting, and I don't think we'll ever have a confirmation on it for all of them.