Advising Koichi against recklessly chasing after the culprit, Jotaro goes up against Sheer Heart Attack, which proves to be resilient to Star Platinum's attacks. Ignoring Jotaro's warning, Koichi sends Echoes to search for Kira, only to find he can control Sheer Heart Attack from outside of Echoes' range, leaving him open to an attack from Sheer Heart Attack. Deducing that Sheer Heart Attack uses body temperature to determine its primary target, Jotaro uses a fire to lure it away from Koichi, but gets critically injured by its amplified explosion. Thinking carefully, Koichi uses Echoes' ability to distract Sheer Heart Attack while he contacts Josuke. As Koichi is once again pursued, Echoes evolves into its third form, Echoes Act 3, using its new ability to increase Sheer Heart Attack's weight and stop its movements. Feeling the weight of the attack on his left hand, Kira is forced to go off to retrieve his bomb.