Thunder Beam

Thunder Beam (サンダービーム) is Elec Man's Special Weapon. When used by Mega Man, it shoots one electrical bolt forward, one up, and one down. It should be noted that it is the most powerful weapon in the first Mega Man game (both the NES version and the Game Boy version). In the NES, mixed with "the glitch", you can make short work of both the Yellow Devil AND Wily's second form!

It can also break certain barriers that can otherwise only be removed by the Super Arm.