When Yuck switches Yan and Yang's auras, they not only have different powers; they have different personalities as well! Will they figure out a way to cope with their new mindsets, or will Yuck become the newest civic authority?
Yan and Yang are hired to protect a crown that will make anyone who wears it the town's ruler. Yuck, of course, comes and trys to steal it, Yan and Yang working together defeat him and kick him over the horizon. When Yuck lands in the woods his sees like Yan and Yang kinda looks like him on his shoulder. The pink one says that because he was made from Yan and Yang they are boy and girl. The pink gives the idea of Aura Swap. Yuck then uses it on Yan and Yang now Yang is like Yan and Yan is like Yang. Now Yang tries to figure out how this happened and Yan just plays video games. Yang figures out what happened and they confront Yuck. Yuck starts to win until Yan and Yang use woofoo aura and then their auras go where they should be they defeat Yuck and kicks him over the horizen and he yells "I blame the girl side of me" and the crown lands on muffin and everything is back to normal.
- This episode features Yuck as the main villain.
- This is the final appearance of Yuck