Well, the soil in Kanto and Johto isn't able to grow berries either (at least, not in Gen 4). The Berry Pots are planters with (presumably) imported soil in them. Why Unova doesn't have them, I don't know...

And I meant the majority of Legendaries (the Birds, Beasts, Lugia & Ho-oh, Mewtwo, Mew, etc.). I know there are a few rare ones that do have a gender (like Cresselia, Heatran, Latios & Latias, I think Meloetta, didn't know Landorus, Tornadus, and Thundrus did). Just seemed odd to me that some rare ones did, most didn't when they probably could. Of course, Mewtwo would likely be male-only, not sure about Arceus. Deoxys and the Regis probably would still be genderless, though.

And yeah, kinda funny that Ditto + Ditto gets you nothing. The irony...