Dimensional Crisis

Dimensional Crisis (次元危機) is a Japanese shōnen manga series written and illustrated by. It was serialized in 's on January 19, 1960, and has been collected into 2,000 tankōbon volumes as of April 10, 2019. The story follows the multiverse colluding, arranging from original worlds to those well-known in film, television and video games.

The series received a 1964 anime adaptation by Tokyo Channel 12 (now known as ) and Mushi Production. The anime resulted in animated feature films. It ran on April 22, 1964 (at the channel's first broadcast) to September 24, 1973. It also received a 1973 anime adaptation by, which ran on October 11, 1973 to July 27, 1979. Like the 1964 anime adaptation, it also resulted in animated feature films.

The 1981 anime adaptation by aired on TV Tokyo on January 1, 1981. The anime resulted in animated feature films, original video animations, TV specials, video games, audio disc releases and live action episodes.

Gleemur/Darkor Arc (2012-present)
On December 21, 2012, civilization was ruined as a result of a worldwide nuclear war and many creatures died out. However, mankind survived and entered an age where the strong ruled over the weak, as the few survivors fought over whatever supply of food, women and uncontaminated water remained in the wasteland of the world.

After controlling every single Agent in the multiverse, Gleemur sends out his new army to invade every corner of the multiverse. Multiple worlds are affected, arranging from original worlds to those well-known in television and video games. The great invasion eventually drew the attention of Darkor, the sinister villain who decided to form an alliance with Gleemur and tear the multiverse apart once and for all.