Technically, it's not breakfast. I had ordered a box edible mushrooms to inspect the local fungi and how they compare to the fungi from my dimension. The order never came, so I ordered more, and they then found my missing order....

[A pause. Lambton happily eats the rest of the berry. Michael skitters away to hide in the corner.]

The berry is consumable in small amounts. And there are historical accounts of humans consuming Magikarp in this universe.