Alright, when we talk about cross-polination, I'm assuming you mean you're using the bees that would come for the rasberry plant to pollinate your male and female cannabis plants, in which case you wouldn't need the bees, the pollen will go from your male to your female without much problem, and, if need be, you can do it by hand.

Raspberry plants and Cannabis plants cannot be crossbred (to the best of my knowledge) because they are two very different plants. They don't share genuses, which is usually as far back you can go when trying to cross-breed or create graft-chimeras. I think if you were to graft a raspberry plant onto a cannabis plant, which would probably be a difficult process trying to get a vascular connection, you'd probably end up with... well, a cannabis plant that tastes like cannabis with a raspberry stem that produces berries that taste like raspberry.

And now you graph... wow, that doesn't sound nearly as good.