I see postings every once in a while for Oshamo chickens and I wonder what a NN cross would look like? I can only imagine.
Done it with shamo and asil. Body is more like NN, only heavier and meatier. If the NN is big, then they can throw pretty big and heavy birds. Tail and body are horizontal on most but some do stand up a little bit.
Basically nothing too extreme however can clearly 'see' the shamo/asil in them. For more shamo looking birds, breed back to pure shamo and a good number will have lots shamo features in them.
They were great broodies, used them and cornish mixes to set on peafowl eggs.
p.s. I currently have a pair of Oshamo... have not bred them with NN though. If you maybe like the look, check out Malgaches- Madagascar games.