Where do you find the cursdoll in megaman battle network 4 red sun?

In MegaMan Battle Network 4: Red Sun, you can find the Cursdoll in the Undernet area, specifically in the Undernet 2 location. To obtain it, you'll need to defeat the enemies that appear there, as it is a Battle Chip that can be found as a random drop from battles. Make sure to check the area thoroughly, as it may take multiple encounters to acquire the chip.