Quarter-Finals! Mega Man X vs. Cloud

I've talked about the Tanks in the previous battle. Tanks are like a part of the Armor, the sub-energy stored in the armor. Different armors have different capacity, like X can have up to 4 sub tanks and 1 part (Unless using Gold Armor) in X3. (While Zero doesn't have access to any upgrade or tank in that game...)

yes but they are still tank "parts"
you dont start with them built into the armor.. you get items which you can add and integrate into your armor.. so they are still technically add-ons that are not directly part of the armor or weaponry
perhaps this may even apply to some parts
also.. X requires power up "items" to fill the tanks for use