I should verify whether Rovio has any portable versions of Bad Piggies. A quick check shows that Bad Piggies is an iOS game originally, but there might be PC versions available on stores that require activation through their platforms. Creating a portable version from scratch without the developer's consent is not feasible.
For further assistance, visit Rovio’s Help Center or contact their support team.
I should also highlight the risks associated with using key generators or pirated software, such as malware infections, security breaches, and the legal consequences. It's important to discourage unethical practices and encourage users to support developers by purchasing the game legally.