The Phantom Galen Cannon is going to Blow!!

"The Phantom Galen Cannon is going to Blow!!" it's the eleventh episode of Mazinger Z. This episode first aired in Japan on February 11, 1973.

Summary
Baron Ashura finds the Galen Cannon. It stayed hidden in a cave on Mt. Fuji ever since Japan lost the war 28 years before. Ashura informs Hell he is planning to use the cannon alongside its Magnum Gunpowder to destroy the Photon Power Lab.

After Sayaka buys new clothes, Boss approaches her and offers to take her home in his motorcycle. She accept, but they get interrupted by Koji. He asks Sayaka to come with him instead. This makes Boss angry and the two boys prepare to start a fight. As a crowd start to gather around to watch, Sayaka gets embarrassed and ends up sneaking off with Mucha.

The two off them end up passing near the cave in which the Galen Cannon is being tested. They get spotted by Baron Ashura, but manage to escape unharmed.

Sayaka returns with Koji to investigate. Both of them inside their respective robots. In response, Baron Ashura sends Brighton J2. The difficult terrain makes it easy for the Mechanical Beast to halt their progress so Sayaka suggests scouting ahead with the Hover Pilder. From the sky, Koji manages to get pictures of the Galen Cannon.

After seeing the photos, Dr. Yumi recognizes the Galen Cannon. Armed with bombs, Koji, Boss and his gang are sent to deal with the weapon before it can be used to destroy the Photon Power Lab.

By climbing around the mountain, Koji and his friends are able to ambush some Iron Masks and steal their outfits. Disguised as Ashura's minions, they are able to rig the Galen Cannon to explode.

Brighton J2 tries to attack Sayaka and Shiro, but ends up destroyed by Mazinger Z.

Recurring

 * Koji Kabuto
 * Sayaka Yumi
 * Shiro Kabuto
 * Gennosuke Yumi
 * Dr. Hell
 * Baron Ashura
 * Boss
 * Nuke
 * Mucha

Machines

 * Mazinger Z
 * Hover Pilder
 * Brighton J2
 * Aphrodite A
 * Galen Cannon

Weapons

 * Breast Fire
 * Rocket Punch
 * Koushiryoku Beam
 * Rust Hurricane