edited for minor grammar adjustments and restructuring of the text.. apparently that is important

Imo including bamboo in this fight is pointless;
one character is using a giant blade and the other is using high energy mech destroying weapons... the entire field would be barren in the first 10 seconds of fighting.

Is the "hadoken" ability of X in Megaman X legal?
This ability is, after all, not entered as a cheat code but rather a secret ability that can be found in the armadillo stage that is designed to be very difficult to obtain.
In any case, due to the fact that Cloud is from a RPG game, he doesnt move that much even when being attacked.
The "hadoken" ability of X is a one hit kill on everything it is capable of hitting in Megaman X.
Therefore, X should not have a hard time hitting Cloud with a "hadoken" and ending the battle.

If "hadoken" is not allowed, or using the structure of an rpg game as a weakness is unfair, or maybe you say that cloud can deflect the "hadoken" with his sword:
X never seems to get tired from all the running and dashing he does in all the games he is in, so I think it would be safe to say he has infinite movement endurance. So, X could run and dash around until the end of time with Cloud chasing him around with his gigantic blade in tow.
Now, given the aforementioned infinite movement, and the addition of the aiming laser and the head upgrade (allowing X to use the laser infinitely) from Megaman X4, not only can X run around forever keeping a safe distance and preventing most possible chances for Cloud to deal damage, but X can run around forever shooting a laser that aims automatically with Cloud cursing and screaming in frustration.
Cloud would eventually succumb to the laser or run out of breath.