I own Super Mario Bros.
I own it on the NES. On a dedicated cart, in a Duck Hunt compilation cart, and on a compilation cart with Duck Hunt and World Class Track Meet. Hell, I probably have four or five of the SMB+Duck Hunt carts.
I own it on the Super Nintendo. Both in Super Mario All-Stars and the +Super Mario World version.
I own it on the Game Boy Color. Super Mario Bros. DX. Twice, actually. Can't play You vs. Boo without two!
I kinda own it on the GameCube. I have it in Animal Crossing, although it had to be unlocked with a GameShark.
I own it on the Game Boy Advance, via the NES Classics release.
I own it on the Wii, having a copy of Super Mario All Stars.
I own it on the Wii U, both the Wii Virtual Console version and the Wii U Virtual Console version.
I own it on the 3DS, originally via the Ambassador Program.
I own it on the NES Mini.
I can play it on my Switch via the NES or SNES online option.
I also own an official physical arcade cabinet with the similar yet superior Super Mario Bros. Vs. (which I also own on the Switch via Arcade Archives).
I have no shortage of options for playing Super Mario Bros.
So why the hell did I just buy *two* SMB Game and Watches?