As Bikendan said, you typically need to order it as an option if you are ordering, or the dealer you are buying from will have had to order it as an option.
I ordered my 2014 Roo 233s with the outside grill. I was under the impression it was coming with an RVQue grill that Turbs mentioned, but it came with the cheaper quality, in my opinion, "Sidekick Grill." I am currently in the process of modifying my Cabela's Stainless Steel Tabletop Grill with a mounting bracket to be able to use it in place of the Sidekick, but in conjunction with with the removable bracket that mounts on the side of my Roo. Before I start doing this modifying, I will have to get a new propane temp adjustment valve/adapter with a quick disconnect for the Cabela's unit as the temp adjustment valve is connected to a propane regulator. The propane regulator on the RV should be sufficient enough to not need a second one on the Cabela's unit.