Which princely states joined Pakistan?

The following princely states joined Pakistan:

• Amarkot
• Bahawalpur
• Khairpur
• Chitral
• Swat
• Hunza
• Nagar
• Amb
• Phulra
• Dir
• Las Bela
• Kharan
• Makran
•  Khanate of Kalat

One princely state, Junagarh, attempted to join India but a local uprising and the subsequent intervention by India led to a referendum that ended the attempted accession to Pakistan.

For further reading check the following articles:

• Portuguese India
• British Raj
• Dutch Colonialism in India