[5] Fifty years in the future, after a terrifying alien species attacked our planet, teenager Stanford Yu works as a janitor at the Sky Corps Military Academy.

When he finally gets his shot, Stanford and his classmates must put aside all personal differences and work together as a team in order to defend humanity against a new invasion of aliens.

Lam wanted to normalize "people of varying backgrounds and perspectives" including a disabled character named Frank Olivetti.

[6] Other supporting cast members included Aparna Brielle as Ava Patel, Victoria Grace as Olivia Park, Josh Sundquist as Frank Olivetti, Anairis Quinones as Maya Sanchez, and James Yaegashi as Captain Tanaka.

Club gave Mech Cadets a critical review, writing that the show's creators "tried to create a family-friendly animated television program by adapting a comic-book series, and made it so deeply sanitized for mass consumption that it's hard to imagine it appealing to anyone.

"[9] Peter Martin of Everything But Horror gave Mech Cadets a positive review, praising the show's structure and "wonderfully-diverse characters."

[10] Anjali Sharma of Midgard Times awarded the series five out of ten stars, describing it as a "cosmic struggle between ambition and acrimony."

She praised the performance of the main cast members Daniel Dae Kim, Ming-Na Wen, Brandon Soo Hoo, and Debra Wilson.

While Jaiswal opined that Mech Cadets could focus more on merit, she praised the series for emphasizing the "importance of team building, hard work, friendships, and family.