"Hataraku Saibou!!" Saikyou no Teki, Futatabi. Karada no Naka wa "Chou" Oosawagi! / 『はたらく細胞!!』最強の敵, 再び。体の中は"腸"大騒ぎ! / "Hataraku Saibou!!" Saikyou no Teki, Futatabi. Karada no Naka wa "Chou" Oosawagi!

Music: Kenichiro Suehiro, MAYUKO

Sound Director: Jin Aketagawa
Sound Production: Magic Capsule

"GO!GO! Saibou Festa" - Theme Song
Performer: Red Blood Cell (CV: Kana Hanazawa), White Blood Cell (CV: Tomoaki Maeno), Killer T Cell/Memory T Cell (CV: Daisuke Ono), Macrophage (CV: Kikuko Inoue), Ordinary Cell (CV: Yusuke Kobayashi), Lactobacillus (CV: Yuuri Yoshida)
Composer: YUMAO
Arranger: Kenichiro Suehiro
Lyricist: YUMAO