I have a bit of a tricky case and looking for some answers as I'm very confused. Any input would be very much appreciated 
So basically my boyfriend was born in Pakistan but moved to the US with his family as a child. He never received his citizenship since at the age of 14 he committed a crime, was charged as an adult and sentenced to 8 years in prison.
Immediately after serving his entire sentencing he was deported back to Pakistan. This was around 12 years ago. Today, he lives in Dubai and has been living and working here for 8 years.
Now he wants to apply for a Canadian temporary resident visa SIMPLY for a visit, he is not looking to permanently move to Canada! My family lives in Canada, and he wants to come over to meet them.
So my questions are the following...1) If he simply wants to apply for a temporary resident visa, does he even need to have the Criminal rehabilitation at all? 2) If he applies for the CR and visit visa at the same time, will he immediately be rejected for the visit visa since the CR isn't approved yet?
Any advice would be helpful!

So basically my boyfriend was born in Pakistan but moved to the US with his family as a child. He never received his citizenship since at the age of 14 he committed a crime, was charged as an adult and sentenced to 8 years in prison.
Immediately after serving his entire sentencing he was deported back to Pakistan. This was around 12 years ago. Today, he lives in Dubai and has been living and working here for 8 years.
Now he wants to apply for a Canadian temporary resident visa SIMPLY for a visit, he is not looking to permanently move to Canada! My family lives in Canada, and he wants to come over to meet them.
So my questions are the following...1) If he simply wants to apply for a temporary resident visa, does he even need to have the Criminal rehabilitation at all? 2) If he applies for the CR and visit visa at the same time, will he immediately be rejected for the visit visa since the CR isn't approved yet?
Any advice would be helpful!