A regional lock is a mechanism first introduced to console games by Nintendo that prevents the use of a product outside a certain territory or location. Nintendo implemented regional locks on its consoles in response to signficant issues with the Nintendo 64 console regarding grey market transactions and legal issues concerning censorship.
No they are not.
Physical cartridges can be played on any console from any region. However a physical cartridge from Japan will not usually have European languages, playing on an EU system will not change this.
Digital games from any region can be accessed by creating an additional account on the console, specific to that region.
Nintendo DS are region-free, mine plays European, American and Japanese games just fine.
Yes it is!
It's been done by Nintendo to prevent piracy from R4.
No, they are not. I have many US GBA games, which play perfectly on a UK GBA.
No, the 3DS is region locked.
No, all 3DS consoles are region locked.
No, the 3DS is region locked.
Yes
No. The 3DS is region locked, EU games will not work on a US 3DS.
No, 3DS games are region locked.
It can play European DS games, but not European 3DS games. 3DS games are region locked, but you can still play regular DS games on any 3DS console (tested with European 3DS and US DS games).
No, the 3DS is region locked, a US game will not work on a European console.
Yes, you can. However, since the Nintendo 3DS are region locked, the European 3DS will not be able to play North American 3DS games.
no, region locked! Japanese 3ds games will only plan on japan version 3ds.
Keep in mind the following - 3DS games are region locked, either Japanese, EU + Australia, and US/CAN versions. This region is the only important factor, not your geographical location. You can use a US 3DS in the UK just fine with a UK charger, but, you will have to import US 3DS games as EU ones will not play on it. You can purchase digital games from the US eShop, but you must buy $US wallet top-up cards, these are currency and country locked so again a £UK one will not work.
Regular DS games from the UK will work on a 3DS from any region, including the US. It is only the 3DS games that are region locked, so a UK 3DS game would not work.