What is the Xbox pre-order bonus?

The Doggo Dude is tied to the platform, not to the edition alone. Buy the same pre-order pack on PC and you do not get it. If you want this one, the pre-order has to be the Xbox one.

The way in is the extended pre-order editions sold on consoles before launch. There are two: the Advanced Edition at $9.99 and the Collector's Edition at $20. Both carry starting items and bonuses in their own right, and the Collector's Edition also includes exclusive in-game accessories along with the Collector's Companion Guide. The optional bundles sit at the $9.99 and $19.99 price points.

Keep the Doggo Dude separate in your head from the pre-registration rewards. Reaching 30 million pre-registrations unlocks the Sunlit Myriad limited outfit set, which is a milestone cosmetic rather than something attached to a purchase. Wishlisting is separate again. Aniimo can be wishlisted on PC and console storefronts, and a wishlist entry is not a pre-order, so it does not put the Doggo Dude in your account.

Not settled: The bonus is described against Xbox Series X pre-orders specifically. Whether pre-ordering on other Xbox hardware carries the Doggo Dude is not settled.