If Giratina were to have a Pokésweet counterpart,
it will be based on diabetes. Either Giratina, or the Pokemon closest to the Satanic Archetype.The B in B-Day Cake stands for breakfast, not birthday.
Why else can it wake a sleeping Pokésweets?Animals exists in the world of Pokésweets
For example, ants that crawls around to bit a little piece off the mons.