Players need to be mindful of how much health X can afford to restore at any given time, lending some element of foresight to Tank system. While they’re not a one & done deal, drinking a Sub-Tank drains it full. Sub-Tanks are more strategic in use than E Tanks. Along with featuring a progression system & a darker story, Mega Man X replaces E Tanks with Sub-Tanks– unlockable items that store health for later. MMX was a radical departure for Rockman, one that arguably split the series into before & after. RELATED: Mega Man X: Every Armor Location (& What They Do)īut like most things in classic Mega Man, E Tanks were not deemed fit to return for the franchise’s jump into 16-bit: Mega Man X. Fully recovering all of Mega Man's health when used, E Tanks make getting through the classic series all the more manageable. After all, with enemies irregularly dropping health pellets, players needed some way to control their Life Bar at any given moment. With very few exceptions, every game in the mainline Mega Man series from that point on featured E Tanks in some capacity. A staple of the classic series, E Tanks were introduced in Mega Man 2 and quickly became the Blue Bomber’s go-to method of healing.