InuYasha Episode 130: Shippo`s New Technique, The Heart Scar!
Episode 130 of 167 of InuYasha, aired October 27, 2003, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Shippo meets a group of fox demons who heard a legend about the mighty and powerful Shippo and they ask him to protect them from a lizard demon. Shippo uses his ultimate attack, the Heart Scar.