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

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Spoiler] Kill la Kill X Tengen Toppa Gurren Lagann : r/anime

Gurren Lagann ep. 20, How Far Will God Test Us? Review - Fresh Takes #19, RPC

WE CAN SIMP AGAIN!!!, EVERYONE IS BACK FOR A FIGHT

Gurren Lagann – 15 – Random Curiosity

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

Viral, Tengen Toppa Gurren Lagann Wiki

Code Geass Helmer Goro Taniguchi's Back Arrow Anime Unveils Story, Characters, More Cast & Staff, 2021 Date in Video - News - Anime News Network

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

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

WE CAN SIMP AGAIN!!!, EVERYONE IS BACK FOR A FIGHT