Here you can find all the anime episodes released so far for the anime series: Shin Mazinger Shougeki! Z Hen.
The anime episodes for Shin Mazinger Shougeki! Z Hen are available for download via torrent or direct download.

Synopsis:

A 26 Episode anime production by Bee Media and CODE and directed by Yasuhiro Imagawa (Giant Robo, Bartender, G Gundam), it is based on Go Nagai’s long-running and influential mecha series, the Mazinger series.

Developed from Japanium ore is the super energy, Photon Power. Seeking this energy is Dr. Hell, a madman craving world domination who along with his subordinates Baron Ashura and Count Brocken, commands the Machine Beasts excavated from Bardos Island (believed to be Rhodes) to attack the Photon Power Lab and take it for himself. Meeting the attack head on is our hero, the hot-blooded teenager Kouji Kabuto who pilots the super robot Mazinger Z, constructed by his grandfather Juzo and made from the strongest metal Chogokin Z. But in this battle between Dr. Hell and the Kabuto family, many legends surrounding the Mycenaean Civilization and Bardos Island, as well as the secrets of Mazinger Z remain shrouded in mystery.

While the premise is similar to the original TV show, the staff insist that it is not a remake or sequel and that it will develop into an all-new story, as seen in the cast of characters which features many new faces. There is also a significant number of characters and mecha from other Go Nagai series, such as Zeus from Z Mazinger and the titular mecha of Groizer X.