Metal Bros.
The Metal Bros. appear in Super Smash Bros. Melee's Adventure Mode as stage bosses of Battlefield.
Metal Mario
Metal Mario more or less reprises his role as a special opponent from the single player game from the first Super Smash Bros.. He is fought after the player defeated the fifteen Fighting Wire Frames. Metal Mario is not a unique opponent; he is actually a Mario that is permanently under the effect of the Metal Box item. He is agressive, and his recovery is longer, but he falls much faster. If the player has unlocked Luigi, Metal Mario teams up with Metal Luigi for that same battle, making it more difficult.
Trophy Information
Metal Mario also appears as a trophy which can be acquired randomly through the 1-P mode or the Trophy Lottery
Metal Mario
"Mario was in for a surprise the first time he hit a Metal Box in Super Mario 64. The metal cap that popped out transformed Mario into living metal, giving him great stamina, a heavy tread, and the ability to walk underwater. In Super Smash Bros., Metal Mario showed up as an incredibly stubborn midlevel boss." (Super Mario 64, 9/96)
Metal Luigi
Metal Luigi appears in Super Smash Bros. Melee with Metal Mario after defeating the fifteen Fighting Wire Frames in Adventure Mode. He only appears if the player has already unlocked Luigi. Stat-wise, he is, like Metal Mario, constantly under the effect of the Metal Box. Metal Luigi is somewhat of a coward during battle, as he never leaves Metal Mario's side in battle. If Metal Mario is KOd, Metal Luigi avoids contact with player unless he/she is close. Luigi can enter this state by normal means if he breaks a Metal Box, but this version is only temporary. Metal Luigi can also appear in Brawl during Classic Mode by chance yet functions like a normal CPU during battle.