Much like Irving is obsessed with Phineas and Ferb, Irwin is obsessed with Irving, though even more so. He collects various of body liquids, including blood, sweat, and tears. Though later, it's revealed he was only working for Thaddeus the whole time. However, he did like irving quite a bit. Later on, he is hit with Doof's obbses-inator making him obsessed with Irving to a much bigger extent .