Final boss

A final boss is the last boss in a video game. In Metroid, final bosses are very hard and often have extremely damaging moves. It is a good thing to have all energy tanks collected before one faces the final boss. The final bosses from the Metroid games are:
 * Metroid One - Mother Brain
 * Super Metroid - Mother Brain
 * ''Metroid II: Return of Samus - Queen Metroid
 * Metroid Prime - Metroid Prime
 * Metroid Prime 2: Echoes - Dark Samus
 * Metroid Fusion - Omega Metroid
 * Metroid: Zero Mission - Mecha-Ridley