Sgt Frog Graphic Novel Volume 19 (Of 19)

"(W/A) Mine Yoshizaki Rating: T (Teen Age 13+) for Moderate Language, Moderate Violence Keroro continues his efforts to invade Pokopen in vain as he tries his hand (voice? ) at karaoke, morphes Giroro into a cow, schemes to scatter invasion materials around Earth by bubbles, and makes humans into remotely controlled soldiers. He also tries to enlist the help of humans by making them into Keronmen. Could Keroro finally succeed this time? "