No, it is not possible to upgrade the engine of a Bajaj Pulsar 180 to that of a Pulsar 220 or any other higher displacement engine. The engine is a crucial component of a motorcycle and it is designed specifically for the model it is built for. The Pulsar 180 and Pulsar 220 have different engine configurations, power outputs, and overall design.
Engine upgrades typically involve significant modifications to the chassis, suspension, and other supporting systems of the motorcycle, in addition to the engine itself. These modifications are usually performed by professional tuners or custom shops with extensive knowledge and expertise in motorcycle modifications.
If you are interested in increasing the performance of your Pulsar 180, there are other modifications you can consider, such as upgrading the exhaust system, air filter, or tuning the existing engine for better performance. However, it is important to note that any modifications should be done carefully, considering the compatibility and safety aspects, and you should consult with a professional to ensure that the modifications are appropriate for your motorcycle.