>>42568435Gengar is a fully evolved ghost pokemon. The amount of lethality that a pokemon such as that could be capable of is immense.
We're talking possession, we're talking ghost attacks that can happen at any time, with barely any warning. Before you can even send out your Rapidash, or whatever mon you've got. That Gengar essentially can do whatever it want to your soft, squishy little human body.
It isn't unscientific to suggest giving up. Remember, how you die is important. Because if you die with fear or anger in your heart, it might corrupt how you reincarnate in the next life.