Walmart requires all their partner's items to have UPCs in order to list them on Walmart.com - Click here to learn more.
At the moment, using SellerChamp, you can only search and submit items which have an existing UPC - Click here to learn more.
If you want to create a completely new Walmart listing, you'll have to do it directly from your Walmart seller central account. We currently do not have a provision to do it from SellerChamp.
We do have guidelines and suggested tips to create your awesome listing(s) on Walmart.com - Click here to learn more.
We'll soon have the option to actually be able to create a new listing using SellerChamp.
Feel free to get in touch with us in regards with any further question or concerns.