I have bought my ds2 the waybuloo noktok toy that talks and also the peek yojojo.
Noktok is lovely, he's quite soft bodied and says lots of phrases and you dont have to press his tummy too hard.
I was really excited to get the yojojo as so hard to locate. What a complete dissapointment. Its got a very hard body and head which is hard to press. The ear movement is noisy (clicky) and naff. They only move when you press the tummy, so as you press the tummy in hard teh ear click out. It says only 3 phrases and plays a little music. Its eyes are cute as they are rounded plastic but definately not worth it and i'll be returning it to the shop tomorrow.
Noktok is much mich better value and better quality too.