The listing, Ping Pals for Nintendo DS has ended.
I don't have the case anymore, but my kids no longer use it.
Here's the description from Amazon:
"In this chat/accessory program, you will create your own Ping Pal by choosing from thousands of different items to make your Ping Pal your own cool person. Play games, discover secret code words, and share your Ping Pal with friends to earn Ping Points that allow you to unlock special items. Chat and trade with friends to find and collect the hottest gear for your Ping Pal!"
I thought it was cool! They preferred their Pokemon and other games to it though.