Which Hamster can i talk to get the Pooie word from Hamtaro Ham Ham Unite?

Well first go to the ruins. After you pass the ham-ham sitting at the table, go down. Instead of turning right turn left. Stand at the right corner of the tv. "Tack-Q" it four times. After you hear someone yell, go back up to the ham-ham and "hamha" him. He will then teach you "Pooie". Hope this helps ;)