Because this event is more focused on leveling up your Pokemon and not feeding your Snorlax, the dish and berry types are not predetermined based on the event. While that means you can end up ...

Turns out the only thing harder than waking Snorlax up is defeating a Shadow Snorlax in battle. Currently, Shadow Snorlax is one of the hardest Shadow Pokémon available in Pokémon Go.