Dex's little brother, Chisao, comes for a visit and our heroes discover the siblings are nothing alike. Chisao attends Kindergarten for geniuses! Chisao idolizes Dex, believing that his big brother is the gang's mentor and leader. Dex begs his friends to play along, just until Chisao returns home to Netopia. Meanwhile, a new noodle restaurant opens up next door to #1 Curry, creating a bitter rivalry between Yahoot and Saburo, the noodle shop owner. Saburo tricks Chisao into helping him sabotage Yahoot's restaurant, and gives him a NetNavi with new powers that stuns even MegaMan! In an explosive NetBattle, Saburo's scheme is uncovered, but when the smoke clears, will Dex remain a hero in his little brother's eyes?