Barriode

Barriode (バリアオード) is an enemy from Mega Man ZX Advent that has a hard body, Pseudoroid DNA, and conceals powerful weapons. Its only vulnerable at the top of its head, which is protected when the hatch on its belly opens to attack with energy balls. If the player strikes these energy balls with a charged, elemental attack, the energy ball will absorb that element and continue at the player, bearing the new elemental property. They appear in the Waterfall Ruins.

Trivia

 * The color scheme of Barriode is based on that of Protectos the Goreroid. This explains the striking similarity between them.