When you must fight Hirudegarn with Great Saiyaman 1 and 2 (Gohan and Videl) can be difficult. Because of Hirudegarn's size any physical special moves just bounce off. This makes Videl almost useless, and the only move Great Saiyaman can effectively use is his L2 + Triangle explosion. However, you can press Down + R3 to convert back into normal Gohan. By doing this you can now use many effective energy techniques that Great Saiyaman did not have, and you can upgrade to Super Saiyan 2 which is strong enough to repel Hirudegarn with punches and kicks.