On Zorua’s page, it is listed as only obtainable via “trade/migrate from another game” in Black 2/White 2, but this is false. N’s Zorua is available in-game as a gift, not a trade or migration.
The reason I believe this to be an error is because the event Zorua/Zoroark are listed as possible encounters for Black/White, which required an irl (now outdated) gift event to obtain in the first place. However, it does retain “N” as his OT, so I could see why this would possibly make Zorua’s obtainable status a bit of a gray area.
Still, I feel like “trade/migrate from another game” is not an accurate description. Some mention of the in-game gift should be stated. Something like “received as a gift from Rood, N’s Zorua” on Zorua’s page and “evolve N’s Zorua” for Zoroark’s would be adequate. Trade/Migrate is assumed for all cases not already available in-game.