No one answered because no one knows. You'll have to test it out and find out for yourself. I can't imagine why it wouldn't seeing as you still have to catch them, but I don't know for certain.
For the champion medals,where we have to only use 1 type of pokemon. I know we can use dual types,but can we use more than one?
For example.can I get the Ice Champion medal with the following:
x 4 just Ice.
I have looked around with bing,but haven't found anything accurate to what I am asking.
Like above, You'll have to test it out yourself. I don't know if anyone has tried it yet, so you'll have to go ahead and do it yourself to answer the question.