Creating a bundle listing

Has anyone got any advice on creating a bundle listing for brand products . Basically i want to bundle 2 branded toys together (same brand). It wont allow me to create under ‘generic’ if i then mention the brand name later due to trademark, i cant use GTIN exemption because these branded products have barcodes, but i also cant use the barcode because its being used for a singular item already.
Can anyone give any advice? Thanks in advance