Sajhafan, congratulations for your success under the Federal Skilled Workers Program. To answer your query, the credit scores and ratings from a different country in Canada does not count. You will have to start all over again from zero because Canada has its own consumer credit bureau.

Your bad credit score in US will not have anything to do with acquiring credit cards or financing in Canada, as it all starts from point zero, as I mentioned earlier. However, a bad credit rating elsewhere (esp. the US)  can have a negative impact in the long run when you are seeking a top Canadian Federal job to my understanding.  It is then they will look into all your details for secret clearence and your credit history will then come into scrutiny. 

I am sure there are many more knowledgeable people here in Sajha, please correct me if I am wrong.