WWE 2K25 for Switch 2 is not on the cartridge, nor is it a Game Key Card. It is simply a paper code in a box.

NintendoLife has confirmed that WWE 2K25 for Switch 2 is a code in a box.

The box for the "physical edition" is simply an empty case with a slip of paper in it.

The download for it is a whopping 73.2GB too.