All the information regarding applications for Canadian immigration are given on the official website
www.cic.gc.caYou can choose the category and relevant set of application forms.
There are no restrictions on applications from Pakistan. He himself can apply as Federal Skilled Worker class if his profession is included in the list of 38 professions, for FSW.
You can also find more information in the previous pages of this forum also.
He download and sign the application and Fedex or DHL me

but i don't know what application and what we need mean docs etc ...