15 [Similar Anime] Like Mobile Suit Gundam: Iron-Blooded Orphans

The plot line in both of these shows is nearly identical. However the way the plot progresses and the way the story is told is quite different. Both revolve around a interplanetary society where the higher class of one planet considers those from a different planet to be inferior, despite the fact they are of the same species. In MSG Iron-Blooded Orphans the higher class of Earth amounts that the people on Mars are worthless, and many children are enslaved and forced to fight. In Aldnoah.Zero the ruling class on Mars considers the Earth to be inferior. Both shows involve a Princess traveling to another planet in order to attempt to achieve equality. It's a struggle in both as the ruling hierarchy attempts to thwart the princess in any way possible. Both are quite good in my opinion, and if you watch both of them you will see that the plots practically mirror each other. Both of the shows attempts to shine light on inequality. MSG has more of a serious tone, as it involves child slavery, whilst Aldnoah.Zero is still quite serious but revolves more around a "hero" who happens to be a student.

IRON-BLOODED ORPHANS is very much like a real robot version of Gurren Lagann.
The relationship between Mikazuki and Orga is very much reminiscent of the relationship between Simon and Kamina but adapted to a real robot setting where the grittiness toned up and the optimism toned down. The protagonist has a badass big brother figure he looks up to but also has to learn to be his own person.

I know it might seem odd to recommend these two, but hear me out:
-Both are MUCH improved over their predecessors (Zexal and AGE respectively)
-Both are much darker than previous entrees
-Both share Japanese VAs
-Both feature a return to older plot elements (Arc V takes a lot of cues from 5Ds, and IBO takes cues from AWGX, Wing, and 00)

Both anime focus on the idea of child soldiers piloting mecha and the toll these battles take on their psyche. Both anime share a similar vibe, featuring drama and tons of great mecha action, with Evangelion having a higher focus on psychology, and Gundam IBO having a higher focus on politics.

Though not very obvious at first glance, the similarities between these series are endless. Code Geass has a political motive and Iron-Blooded Orphans feature teenagers who try to create a place they can call home. To achieve their goals, they form groups mainly consisting of outlaws with no place to go. They start out with little power but rapidly rise as they make their way toward their destination.

Both titles are similar in several aspects such as mobile suits, theme, and overall cast. I personally liked After War Gundam X and I very much feel it is the most underrated in the entire Gundam franchise with Iron-Blooded Orphans being my one favorite shows in Anime.
The use of groups such as Teiwaz and Gjallarhorn in Iron-Blooded Orphans can be compared to as the Vultures and Earth group in Gundam X. While the MC in both series are differentiated as Mikazuki is somewhat more of the stoic and battle-driven as compared to the more expressive and rash Garrod. They both also have what you would call a waifu whom both MC need to protect and reach her destination that is integral to their overall goal.
Although IBO plays a darker theme with its use of child guerillas and sense of family as compared the more light-hearted Gundam X that is more focused on the concept of Newtypes and Stopping an inevitable war between the Earth Group and Spacenoids. Ultimately, if you somewhat enjoyed the first season of IBO, then strongly recommend that you give Gundam X a watch.

Iron-Blooded Orphans and Victory both have very similar premises and elements early on, more than just both being Gundam shows. Bother feature a very young or young-appearing MC (as Mika doesn't have an official age iirc), a noble girl who wants to end an oppressive imperial reign, and a young girl who tries to comfort the MC. Tekkadan and the League Militaire are also fairly similar as organizations.

Both series has a main gundam that was created generations before the characters in the story. These gundams are superior in almost every way compared to the other modern mechas in their series and are both piloted by the main protagonists who are on their early teenage years. However, the protagonists are very different from each others in personality such as the protagonist in Iron-Blooded Orphan is stoic child soldier while the one in Turn A is a curious compassionate worker. Both series also has a princess but from different satellites; Iron-Blood Orphans has a princess of Mars and Turn A has a princess of the Moon. Their are also small hints of romance between the main character and the princess in both the series.

G-Tekketsu has the concept of child soldiers being used as a very prominent plot point. This idea has been touched upon since the very first Gundam series but season 1 of 00 was the first to use it prominently and openly.
In 00, the protagonist used to be a child soldier, part of a religious fundamentalist group called KPSA, and is now part of a different group called Celestial Being who use armed force to pursue a world without war and therefore a world where children do not have to be soldiers like he was.

Both: heavily emphasize the nature of war, are strategy based, and have bad ass main character who seek the end goal of a peaceful life.

Like SEED, discrimination against human beings who are not "natural" is a common theme because in both of these series non-natural human beings are so prominent unlike the emergent NewTypes, Innovators and X-Rounders.

If you want a better story with mechas, drama, and politics, Code Geass is one for you. An interesting note is that Mcgillis and Suzaku share the same VA and have similarities once you watch through the whole show.

Fate/stay night: Unlimited Blade Works addpermalink
Both series are darker than the previous series and have to do with survival through wars. I found Orga Itsuka to be the Gundam version of Archer and Kudelia to Saber.

Both series are darker than the previous series and have to do with survival through wars. I found Mikazuki Augus to be the Gundam version of Emiya Kiritsugu plus his Gundam is similar to Berserker as well.

Both shows are about squadron of soldiers surviving the harsh world and involves young soldiers. Akito's relationship with Leila is similar to Mikazuki with Leila as a nod to Heero and Relena plus they are all based on their archetype. Not to mention that one of the characters in Gundam IBO has the same seiyuu and a similar mecha with a relationship with the other character who too has the same seiyuu.