Interesting, rare and sometimes cheap ebay items.

[Skullcruncher]

They look nice, but I've never seen them before, so I'd imagine they are indeed unlicensed, as I like getting those sorts of (official) things.

Are they reproduction sticker sheets of the original Gen1 combiner toys for people wanting to replace their worn stickers, or extra stickers like the Titans Return sticker sheets from Hong Kong?

Thanks, good to know! I thought they could have been inclusions with some modern release or similar.

^ IIRC the company that made them said they had "a license from Hasbro" but it turned out they didn't. The various TF retailers in Asia sold them back in the day.

Ah ok, any further links on this? Thats what Blackthorne did back in the day ("How to draw transformers").