The Club Penguin Pet Empire, or the Pet Shop by CP law, is the only pet store in CP that mainly sells puffles. It is most known for being the main adoption centre for the annoying Mwa Mwa Penguins.
During the planning of CP, the South Pole Council decided to construct a pet store to decrease wild puffles in Antarctica. They also wanted to educate penguins for a sense of responsebility, or so they thought. Whatever the case, it recieved a unaminous vote and it was eventually put into construction. It officially opened on October 31st, 2005, seven days after the same day CP became, well, CP.
Mwa Mwa Penguins only came about in 2006. Seeking for an adoption center, they roamed around the whole of CP to find one. Eventually one of them suggested,
I know! Why dwont wee waid the Pwet Shop? Mwany pweople gwo there to adwopt!