Episode 12
AA : http://www.anime-access.com/anime/T/Tengen_Toppa_Gurren_Lagann_%28TV%29/episode/12/%5BZagarer%5D%20Tengen%20Toppa%20Gurren%20Lagann%2012%20%5B480p.Hi10%5D.mp4
Episode 17
AA : http://www.anime-access.com/anime/T/Tengen_Toppa_Gurren_Lagann_%28TV%29/episode/17/%5BZagarer%5D%20Tengen%20Toppa%20Gurren%20Lagann%2017%20%5B480p.8bit%5D.mp4