Several months ago, I was writing a fan-fiction story set in the Sonic the Hedgehog universe and I ended up constructing this sentence:
"...Sonic and his allies and Dr. Robotnik and his allies..."
My intent here is to group Sonic and Sonic's allies together and Dr. Robotnik and Dr. Robotnik's allies together, but doing so with "and"s causes this problem. I fixed it by replacing the second "and" with "versus", thus reading as:
"...Sonic and his allies versus Dr. Robotnik and his allies..."
My question is: is the original construction still valid?
I'm also curious about my usage of "his" to refer to two different males in a row.