SNES games have a resolution of 256x224 (8:7) but are meant for 4:3 screens

[Pr3tty F1y]

In other words, stretch the picture to 4:3 for every video game that came out prior to PS2/XB/GC

This. Non-square pixels were totally a thing (and, I guess, still are).

Same thing goes for things like CPS1/2 arcade games. They run a 384x224 resolution but are not wide screen. They should be stretched to a 4:3 AR to be viewed as intended.

EDIT: Also, some SNES games run at 512x448 (well, R.P.M. Racing does - at the expense of color depth and having interlaced video output, but it is HiRes) as well as others that run at 512x224 (like Kirby' Dream Land 3) where you get "translucency" where none really exists as it's alternating solid lines of pixels that CRTs will seamlessly blend to create the appearance of translucency (due to the higher pixel density across the horizontal axis) where the SNES's color math (addition/subtraction) which is usually used for SNES translucency is not being used. However, all are still 4:3.