Because it possesses the "Alpha inForce" ability, an ultimate force which, in battle, instantaneously replays the elapsed battle, although Alphamon's attacks are over in just an instant, you can't grasp how many attacks it actually unleashed, and in theory, you can only see the final blow that brought down its opponent.
Its Alpha inForce allows it to take back the time that has elapsed in an instant!
What is said:
1) Alphamon attacks;
2) Alphamon reset the battle;
3) You can not see how many Alphamon attacks used in battle, the opponent just sees the last attack.
From what has been said it seems that Alphamon restarts the battle, but the effect of the blow continues. So we can say that Alphamon is technically unaffected by temporal restarts, so Alphamon's attacks still exist even back to the past before the cause that created them to exist. Thus, Alphamon is able to take an attack (a cause) and go back in time to repeat the attack (another cause), but the initial attack did not disappear and continues advancing to the opponent (Effect). So Alphamon is able to restart the cause and effect relationship to repeat his actions, however the effects of the initial cause continue to exist even with their cause no longer exist, it is a mixture of temporal restart with acausality in my opinion.
It is actually as if Alphamon added effects without the causes existed, at least not in that timeline. The initial cause comes from a past that no longer exists because time has been restarted, but even without cause the effect continues to exist. So the list of events would be:
1) Alphamon attacks (Cause)
2) Alphamon resets time;
3) Alphamon attacks (Another Cause), but the effect of the first event continues to exist.
4) Alphamon repeats this cycle always restarting cause and effect without the effect ceasing to exist.
5) After an indefinite number of restarts the opponent receives a large number of effects whose cause no longer existed in its timeline.
The final effect is the same as it already is on your page, Alphamon can give an infinite number of movements in a single instant. But I do not think it should be considered as causality manipulation, to me this is more like a Temporal Manipulation (Time Resets) and Acausality (Alphamon's attacks continue to exist even though their cause has not yet occurred) junction."
All we have is the databook and we don't know who it was used on. Although considering the Digimon Alphamon is, likely one of the Top Tiers. But whateves. I have to reread the thresd where this was brought up.