From Neophyte to Overlord in the Apocalypse

The protagonist travels to the end of the world only to find that there are only zombies and Pokémon that no one knows. "Pikapi" was heard at this moment. Pikachu... Why is there Pikachu here? Am I wearing a fake apocalypse? Or are these just pranks played by Pokémon, but they don't look like zombies at all. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.