In my experience, that there are more chances that they will reject your spouse's TRV if you declare upfront that your spouse is visiting you in Canada, however if you are exceptionally lucky then you can make it. Basically the decision to approve or reject lies on the hands and the mood of the visa officer who is looking at your file. Note, once your TRV is rejected for the first time then 90% of chance is that it will get refused subsequently, however if your PR application reaches the final stage or very close to it, then they might approve it. Note if you have multiple strong reasons then that will also fetch you TRV.
If people can afford then I would strongly recommend them to hire an immigration lawyer (preferably within Canada and also one who has good records) to file the TRV application for your spouse and the chances are that you will succeed ~ 75% of the time and this succession rate is only valid for the first time TRV application. This succession rate is due to the fact that the immigration lawyer will not keep any open ends in your application for the visa officer to even have second thoughts. I'd talked to few Canadian immigration lawyers who already denied filing TRV since the PR application is in process, and few other are willing to do only if you have strong reasons to visit temporarily, and the rest will do no matter what. One of the lawyer also mentioned that they usually submit a 7 page cover letter which will address all accepted reasons that are part of the immigration laws through which the spouse is eligible for a visitor visa. Note, a Visa Officer can only refuse visa if they can find a valid reason from your application. They would never refuse an application with no reason especially to a lawyer. But the downside is that it is pricey.
Sounds a Broker for Immigration Lawyer Lol...