When Dr. Eggman (Robotnik in the US version) holds the president and his daughter hostage, Sonic must comply to the evil scientist's demand of going to Eggmanland to stop Black Eggman and deactivate the city's generator before it reaches critical mass. Little does Sonic know that it's a trap to activate Hyper Metal Sonic, a robot counterpart built by Eggman to destroy our hero. (Source: ANN)

Yuusei Fudou is out to get back what was stolen from him. The world of dueling has evolved, with Riding Duels becoming the peak of entertainment for the residents of Neo Domino City. They are played on D-Wheels, a hybrid between Duel Disks and motorbikes. After the mechanically skilled Yuusei managed to build his own D-Wheel, his former friend Jack Atlas stole it alongside Yuusei's best card, Stardust Dragon; ditching their decrepit hometown of Satellite, he escaped to Neo Domino City. In the two years since then, Jack has risen to the top of the dueling world, while Yuusei has been making preparations thanks to the help of his friends. With his new D-Wheel finished, he now sets off to Neo Domino City, his only goal to find Jack. Unbeknownst to either of them, there are far bigger things at stake than they can imagine, with puppeteers pulling the strings behind the scenes. [Written by MAL Rewrite]

An intense battle rages on at the Tokyo Qualifiers for the three remaining spots in the national volleyball competition. Nekoma High School, Fukurodani High School, Nohebi Academy, and Itachiyama Academy all passionately strive to participate in the tournament. Despite various issues on the court, Nekoma especially wishes to prove they are worthy of moving on to the national level. As the teams aim to secure their place by overcoming both their opponents and their own weaknesses, the Tokyo Qualifiers determine which teams will reign victorious and join the national competition. [Written by MAL Rewrite]

In the year 2005, a race of alien monsters called Zonders emerge from underground and launch a series of attacks on the city of Tokyo. The only defense against these creatures is the secret agency known as the Gutsy Geoid Guard (or 3G) and their ultimate weapon, the awesome giant robot GaoGaiGar. GaoGaiGar's pilot, Guy Shishio, is a former astronaut who was nearly killed two years before when the Zonders first crashed to earth. Guy's life was spared when a mysterious robot lion called Galeon pulled him from the burning shuttle and brought him to Earth. Guy's father, Leo, then used Galeon's technology to rebuild his shattered son as a cyborg, in the hopes that he could stop the aliens when they appear. Now, with Galeon as its core, GaoGaiGar fights to protect Earth. He is aided by a team of transforming robots and by a young boy named Mamoru, who has the power to purify the Zonders' cores, and seems to be connected to the mysterious Galeon. (Source: ANN)