pichu is in the haunted house in the room with the chekered floor near the piano
haunted zone
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In the Haunted House of the Haunted Zone, in the room with the Gengar Painting. Voltorb is in a pot, you have to break it
Keep befriending people and you will finally get him, he lives in the Haunted Zone, in the Haunted House.
You will be able to battle him after unlocking the top floor in the haunted house at the haunted zone.
Sorry, but Zapdos is not in the game.
Metapod. It is found in the Haunted Zone, and is found when you dash into the tree next to the haunted house doors.
you have to go to the haunted zone yard past the bridge to the right by Ronnie or kitty
It is in the haunted mansion.
the cavern zone
in the volcano zone
Kakuna you can get him by bashing into the tree to the right of the haunted house in the haunted zone. You can only be friends with him once you have beaten rotoms shoot em up with at lest 1 pokemon. If you need any help type into google serebii.net and click on pokepark wii pikachu's adventure.