This is a case of an 11(1/2)-year-old diagnosed with Kawasaki disease at 6 months of age. Distal left main coronary aneurysm involving the proximal anterior descending and circumflex had progressed into a chronic total occlusion. We report the first application of a novel percutaneous technique using the CROSSER catheter system in a child. The CROSSER is a high-frequency mechanical vibration catheter-based technology developed to safely penetrate through calcific and noncalcific coronary artery occlusions. This is also the first Kawasaki disease patient to benefit from this technology; in this disease, coronary artery stenosis is typically associated with heavy calcification.