Apparently only the 2.0i and the 2.0i Premium come with a manual transmission.
Here's what the owner's manual has to say about flat towing.
The manual doesn't specifically address recreational vehicle towing. However, the manual also doesn't specify any limitations on flat towing the manual transmission Crosstrek.
Originally Posted by Gopher23
There isn't a big selection to be sure (maybe six in my area), but there seems to be some confusion about if they are towable 4 down. Just trying to see if anyone is actually using one and how it's working out.