When cooked this way, it has a flavor similar to asparagus. Pokeweed berries are also used to produce ink and dyes. However, it should never be eaten because the berries are highly poisonous.
The first is no joke, asking you to catch 10 Ghost-type Pokémon, Make 8 great throws and use 108 berries to help catch Pokémon. It's that last one that's going to take you a little while ...