In a post-apocalyptic world ravaged by earthquakes, grotesque monsters and powerful demons run rampant through the streets of New Tokyo. Only a select few people have been trained in the techniques necessary to defeat these creatures. Brothers Kakugo and Harara Hagakure not only possess the skills, they also harbor the power of the Zero Armor containing the souls of thousands of warriors. Separated from his brother, Kakugo roams the land fighting in order to restore some sort of peace and safety to mankind. However, he finds these monstrosities to be merely pawns to a much larger adversary from his past, who may prove to be his most dangerous opponent of all.
Sho Fukamachi is just an average high school student,until one afternoon, Sho and his friend Tetsuro stumble upon what looks to be a landmine, which Sho accidentally activates. Instead of attacking and killing him, it grants him control of the Guyver, a powerful biological armor, which the evil corporation Chronos wants to take at any cost, even if it means killing Sho and his friends.
At their simplest, Guyver and Apocalypse Zero are anime about a guy in a living power suit that fights monsters and opposes an evil organization.
Guyver does away with the over the top gore of apocalypse zero and instead comes up with more story and character development. Regardless, if you enjoyed the battles in Apocalypse Zero, you are sure to enjoy Guyver.
Throughout the galaxy, two villians destory and pillage anything in their path. Their names are Cross and Chaos, and they are ready to invade their next target: Earth. The only defense against these warriors are the Iczelions, a fusion of young girls, and Iczels, sentient body armor. Nagisa is a typical high school girl who is about to become the next Iczelion against her will, to defend the planet and save the human race! But not if she has anything to say about it...
Both anime have both bad guys being either a strange brother and sister combo (Iczer) or a very angry sister of the hero (Apocalypse Zero) that want nothing more than to beat the crap out of the good people that stand in the way of their goals. Apocalypse Zero has much more gore and shock value to their scenes than Iczer but both have similar story pacing and confusing characters. If you liked one check out the other.