Gurren Lagann - Episode 20 of Back Arrow has a What else?

Episode 20 of Back Arrow has a "What else? COMBINE!" Reference from Gurren Lagann. Kazuki Nakashima was the writer for both Gurren Lagann (2007) and Back

Gurren Lagann: Specials (2007) — The Movie Database (TMDB)

DECISIONS MUST BE MADE GURREN LAGANN EPISODE 20 REACTION

Episode 20, Tengen Toppa Gurren Lagann Wiki

A Rewatch to Pierce the Heavens - Tengen Toppa Gurren Lagann Episode 20 Discussion [Spoilers] : r/anime

I screencapped all of the eyecatches from the new Gurren Lagann blurays. Enjoy! : r/anime

Back Arrow Episode #20 Anime Review

A Rewatch to Pierce the Heavens - Tengen Toppa Gurren Lagann Episode 20 Discussion [Spoilers] : r/anime

Gurren Lagann fans in a nutshell : r/gurrenlagann

Back Arrow: 2021's Campy Mecha Hidden Gem, by TGRIP, AniTAY-Official

Back Arrow Anime-Planet

jjk animation by yooto and gurren lagann movie2 animation by sushio #j, Gurren Lagann JJK

Episode 4 - Back Arrow [2021-02-03] - Anime News Network