There's no need to spend your hard earned pocket money to get Tamagotchi codes for V2 or V3. There are loads of websites that publish this information for free. However, many of the V2 codes published (in both guides you might buy on eBay and on some websites) are wrong. One reliable source for both V2 and V3 codes that I have found is on the cute-13.com website.
If you have found this information helpful - please click the 'yes' button!