"Net Kritterz" is a fictional virtual pet game from the "Diary of a Wimpy Kid" book series. The fictional game lets players own and care for virtual pets, with some actions requiring real-world money.
Some real-world virtual pet games that are similar to "Net Kritterz" include "Neopets" and "Webkinz." Both are browser-based games for children that enable caring for virtual pets. "Neopets" lets users access most parts of the virtual world for free, while "Webkinz" requires purchasing a real-world plush toy to access the virtual world. "Neopets" users can purchase optional currency called NeoCash with real-world money, which allows customizing pets with clothing and accessories.