Which Nintendo Consoles are Region-Locked?

Some of the Nintendo consoles released are region-locked meaning you can only play specific games on a console in Japan versus a console in the United States. Here is a list of all the consoles and whether or not they are region-locked.

Nintendo Entertainment System

(nesvsfamiom)

Region-locked: Yes
Regions:
NTSC (North America)
PAL-A (United Kingdom, Australia, and Italy)
PAL-B (other European countries)

Can it be hacked?: No

Super Nintendo Entertainment System

(wikipedia)

Region-locked: Yes

Regions:

NTSC (North America)
PAL-A (United Kingdom, Australia, and Italy)
PAL-B (other European countries)

Can it be hacked?: Region-locks could be bypassed using special unlicensed cartridge adapters such as Game Genie.

Nintendo 64

(assemblergames)

Region-locked: Yes

Regions:

NTSC-U (North America, South America, Singapore, Malaysia, the Philippines, Thailand and Indonesia)
PAL (Europe and Oceania)
NTSC-J (Japan, Hong Kong, and Taiwan)
NTSC-K (South Korea)

Can it be hacked?: No

Gameboy

(turbosquid)

Region-locked: No

Gameboy Color

(polygon)

Region-locked: No

Gameboy Advanced

(etsy)

Region-locked: No

Gameboy Advanced SP

(willem)

Region-locked: No

Nintendo Gamecube

(neogaf)

Region-locked: Yes

Regions:

NTSC-U (North America, South America, Singapore, Malaysia, the Philippines, Thailand and Indonesia)
PAL (Europe and Oceania)
NTSC-J (Japan, Hong Kong, and Taiwan)
NTSC-K (South Korea)

Can it be hacked?: The Gamecube's regional lockout can be bypassed either by console modification or simply by third-party software. Datel's FreeLoader or Action Replay discs are most notable.

Nintendo Wii

(youtube)

Region-locked: Yes

Regions:

NTSC-U (North America, South America, Singapore, Malaysia, the Philippines, Thailand and Indonesia)
PAL (Europe and Oceania)
NTSC-J (Japan, Hong Kong, and Taiwan)
NTSC-K (South Korea)

Can it be hacked?: The Wii's regional lockout can be bypassed either by console modification (also through BIOS hacking) or simply by third-party software. Datel's FreeLoader or Action Replay discs are most notable.

Nintendo Wii U

(ninendtoday)

Region-locked: Yes

Regions:

NTSC-U (North America, South America, Singapore, Malaysia, the Philippines, Thailand, and Indonesia)
PAL (Europe and Oceania)
NTSC-J (Japan, Hong Kong, and Taiwan)
NTSC-K (South Korea)

Can it be hacked?: Yes, you can add the Homebrew hack to your Wii U.

Nintendo DSi and 3DS

(geek)

Region-locked: Yes

Regions:

NTSC-U (North America, South America, Singapore, Malaysia, the Philippines, Thailand, and Indonesia)
PAL (Europe and Oceania)
NTSC-J (Japan, Hong Kong, and Taiwan)
NTSC-K (South Korea)

Can it be hacked?: Yes

Nintendo Switch

(cnet)

Region-locked: No