At the time you renew your PR card you need to show that you have spent a minimum of 2 years in the 5 years preceding application date.
So for example if you failed the residency in the 5 years from initial landing but then managed to enter Canada without being reported , stayed put for 2 plus years and only then applied to renew PR card given the RO must be met in the 5 years before the renewal application date.
You need to be clearer on the sponsor question. A PR cannot sponsor anyone unless they are compliant with the residency obligation, whether they have a valid PR card at the time or not.