look on a online shopping site
Ebay
In Five Nights at Freddy's 2, plushies can be obtained by completing the minigames throughout the game. Each minigame has specific conditions for acquiring plushies. Make sure to explore the game thoroughly and interact with all elements to increase your chances of finding plushies.
toys r us
Buy a white Chao from the black market
South Park plushies are very rare. The only place i have seen them for sale is the Tobacco Station. Otherwise just try claw machines.
You can buy some at the Japan section of Epcot in America. Some are usually for sale at Pokemon World card tournaments. If you can't find any at any of these places, go on Ebay (there's always plushies on Ebay!).
You would breed a yellow chao and blue chao. Or you could buy a green chao egg from the black market.
You can Buy them Online or at Anime conventions.. the anime Convention i wen to i got a Miku Hatsune Plush
"Furries" are alive. Plushies are dolls.
Chao Fruit are food that you can feed your Chao to increase its Stamina stat. You can find Chao Fruit in the Chao Gardens, or buy them at shops in various Sonic games. Hope I helped!
monotone chaos are the chao that you buy from the black market
Jewel chao are chao that have the look and colours of jewels. You can buy them if you have a gameboy advance and game link cable. They're expensive though.