How To Bundle Products

Hi,

Well, there are many ways to approach this based on what you need.
For example, you could create a product C with the same name as product B but with a different price and linked to an unpublished category so that it doesn't appear on its own on your frontend. Then, you could add product C as an "option" of product A thanks to the setting of the same name when you edit product A.
That way, on the product page of product A, the customer will be able to select product C or not when adding product A to the cart.
Make sure you also have the "group options with product" setting turned on in the HikaShop configuration so that products A and C are grouped together on the cart/checkout.
Note that the stock of product C and B are not linked. But you can actually linked them by adding product B as a "bundled products" of product C.
The downside of doing it like that is that product C and B have a different code while they are the same product. But maybe it's not an issue for you.
You could alternatively have a product C with both product A and product B as bundled products of that product with the global price set in product C. And then you could add product C as a related product of product A and product B so that the pack would appear on the product page of product A and B with its own add to cart button.