I applied for my husbands sponsorship and we are now awaiting his PPR and COPR. I do understand that there is super visa for parents and grandparents, but that can only happen once my husband has 1 T4, which will happen after a year. But my MIL will be alone back in Pakistan, is there some other visa we can apply for her and take her along with her once we make the move?
There is no way for your mother in law to move to Canada, even after your husband has a T4. All she will be able to do is visit temporarily. In order for your mother in law to move to Canada, you will need to qualify, be selected, and sponsor her for PR so that she can live with you here permanently.
As said above, the only option right now is for her to apply for a TRV / regular visitor visa. To be approved, she will need to show strong ties to her home country to show she has no plans on remaining in Canada long term. She will also need to show that she has sufficient savings to cover her trip to Canada.
Applying for a super visa will be an option once your husband has been approved for PR and has landed in Canada. As you're aware, you need to meet the minimum income requirements to apply. Assuming you are working in Canada and meet the minimum income requirements, you can co-sign the application (note that your income must be from Canadian sources). However applying will not be possible until after your husband has become a PR and has moved to Canada.