There’s 2 versions of the NES (plus two versions of the Famicom)
The SNES saw a smaller version released later
The Gameboy saw Pocket, Light, Color variants.
The GameBoy Advance had a flip model and a later variant with a better lit screen.
The Wii saw a few cost reduced models that lacked GameCube and WiFi.
The Wii U was released in two different versions with less storage on the white model.
The Switch has the Switch Lite and the newer OLED Switch.
The DS line had DS, DS Lite, DSi, 3DS, 2DS, 3DS XL, New 3DS, New 2DS and I think a New 3DS XL.
Plus they have partners who release console variants like the Sharp TV with built in console, the Sharp Famicom with built in disk drive, the GameCube that plays DVDs from Panasonic.
Nintendo releases a lot of versions of its systems.
Some of those devices you describe were different consoles and not just variants.
Gameboy color had games exclusive to it that wouldn't run in a gameboy, the DS/DSi/3ds were different consoles, even if few DSi exclusive games were released.
