科学忍者隊ガッチャマンファイター カラオケ GATCHAMAN FIGHTER KARAOKE (SING ALONG)

 This is the latest of my many attempts to sing this song (I couldn't find a decent karaoke track of this song , so I just sang along the original track) . It is this phrase ...とりかえせ... that is bugging me . ささきいさお さん　(Sasaki Isao san) and other native Japanese karaokians (I just made this name up if others have not already) sing this phase quite differently from how it should be pronounced in regular conversation.  Can any expert familiar with this song shine some light? 教えてください。