Larry Cooper is Loopy's older and intellegent brother. He knows alot about Loopy's adventures but he is almost never there. In Season 1, his voice is lighter but it became deeper in the rest of the seasons, similar to Henry. He seems to work on physical events such as baseball and lifting weights. Loopy calls him by many nicknames (ex. Lamebrain Larry, MuffinHead, Snot Sausage). Female fans of Kablam adore Larry.