For reference there are a few different types of IDs that Ka Sheng multis are known to use on Gameboy multis. Examples include IDs that start with NT, JU, CY, UA, CA, US, and a couple other obscure ones that are almost never used. UA, NT, and CY I would say are the most common. US is also common, but those tend to not have anything good on them
Also, they often (but not always) use translucent plastic, sometimes with glitter