Tengen Toppa Gurren Lagann, Rainbow: Nisha Rokubou no Shichinin Recommendations
Rainbow and Gurren Lagann are two shows that take place in vastly different worlds, but they both share the theme of brotherhood and sacrificing oneself for the sake of others. Although both shows have that standard shonen theme flowing through the story and characters, Rainbow tends to be more mature in expressing that brotherly bond, whereas GL is more lively and animated. If you liked Rainbow's passionate portrayal of brotherhood, then you might like Gurren Lagann.
Sakuragi is like 50's realitites Kamina and Mario - Simon
Unbreakable bonds, everlasting friendships, and seemingly impossible goals. The Rainbow and the Spiral are one of the same.
-Characters look up to their "Bro" and follow his example.
-"Bro" character is super manly and teaches the other character important lessons about friendship and hard work.
-There is a time skip halfway that shows their lives after the first "fight" ends.
-One younger character strives to be just like "Bro" and others start to see how much he resembles "Bro" later on.
-Friendship, teamwork, manliness, and some super dramatic scenes
When your heart is broken, your soul destroyed, piece it back together with the bonds of friendship! Break through the heavens! Believe in the Bro that believes in you! Rainbow and TTGL have vastly different settings though share similar themes and ideals to help showcase its larger than life characters on their coming of age journey.
Both shows contain a older brother-like relationship, friendship and coming of age. These both show are complete different. But shares the same morals.
-Both have a leader to some sort of team
-The leader and main character have extremely similar relationships in both
-Both have great character development
-Both climax midway through but despite this, keep going
Both involve the themes of brotherhood and fighting against a higher power that is oppressing them. Also, An-chan is very similar to Kamina and Mario is very similar to Simon.
At first glance, these two might not be similar, but both are about the endurance of the human spirit and the importance of friendship in harsh times. As well, both feature an inspiring big brother figure whose way of thinking touches the main characters throughout the series, as well as people he hasn't even met.
Rainbow is definitely more realistic than Gurren Lagann, but both have a tendency to be uplifting.