Any anime fan, whether they love mecha anime or not, can see how cliché Gurren Lagann is as a shonen adventure. The good news is that in a cheesy but fun anime like Gurren Lagann, all these shonen tropes are fully embraced and become a key part of the narrative. Gurren Lagann's clichés don't feel tiresome of boring at all – they're part of the fun, and refreshingly so.
Source:https://www.cbr.com/gurren-lagann-shonen-cliches/