Densetsu Kyojin Ideon: Sesshoku-hen

The Gundam 00 movie reminded me a lot of Ideon, mainly because they both deal with a conflict that arises between two different species that leads to an intergalactic war involving mechas and spaceships. The theme of 'understanding' also has a big role in both anime. 

Both movies are the first in their respective movie series, and they both recap the events happening in the respective TV shows. Both anime deconstruct other anime from their respective genre, with Ideon being a deconstruction of mecha anime and Madoka Magica being a deconstruction of magical girl anime. Both shows feature young protagonists, who must use an unknown power in a battle against individuals from another race. Both shows have an overall similar mood. 

Space Runaway Ideon is one of the anime that inspired Hideaki Anno's Evangelion, since they both deal with similar themes. Both are dark and gritty science fiction anime, featuring destructive mecha that display their own will. Both also have apocalyptic elements. Also, both movies summarize the events that happen at the start of the respective series. 

Both are mecha anime created and directed by Yoshiyuki Tomino. Also, these two movies summarize the events of the respective TV series. Since they are created by the same man, they have a similar style of storytelling. They focus on a war between two opposing factions, an overpowered mecha, and a lot of tragic moments. 

Space Runaway Ideon is one of the anime that inspired Hideaki Anno's Evangelion, since they both deal with similar themes. Both are dark and gritty science fiction anime, featuring destructive mecha that display their own will. Both also have apocalyptic elements.  

Both are mecha anime created and directed by Yoshiyuki Tomino. Also, these two movies summarize the events of the respective TV series. Since they are created by the same man, they have a similar style of storytelling. They focus on a war between two opposing factions, an overpowered mecha, and a lot of tragic moments. 

Evangelion and Ideon are very similar, infact Evangelion was heavily inspired by Ideon. A Contact is a recap movie of the Ideon series similar to how Death & Rebirth is a recap movie of Evangelion.