Mettenna

Mettenna, known as "Mettorio" (メットリオ) in Japan, is an EM Virus from the Mega Man Star Force series. They are clearly the successors of the Mettaur viruses from Mega Man Battle Network.

Mettenna / MettennaG
Mettenna: Has a yellow hard hat and green cross. Doesn't hide under its helmet.

Mettenna2 / Mettenna2G
Mettenna2: Has a red hard hat and yellow cross.

Mettenna3 / Mettenna3G
Mettenna3: Has a blue hard hat and purple cross.

Battle Cards
Grand Wave (グランドウェーブ) is the Battle Card dropped by viruses in the Mettenna family.