Hey You, Pikachu! consists of several activities, which you experience with Pikachu over the course of the days. Here are the seven levels with their objectives, based on Poképédia. The titles are those of the American version, with a French translation.

A day with Pikachu.
An activity.
Another activity.

A Pokémon Picnic (Un pique-nique Pokémon)

Pikachu gathers ingredients for Bulbasaur‘s meal and brings them to it with the help of Magnemite. A Togepi Egg sometimes appears.

Caring for Caterpie (Soins pour Chenipan)

You have to make Caterpie evolve into Metapod by entertaining and feeding them. At the end, the Metapod turn into Butterfree.

Field Trip (Promenade au champ)

A free-roaming level with no objective: Pikachu plays with Oddish, Gloom and Vileplume, sometimes with Charmander and Diglett.

Gone Fishing! (Parti pêcher !)

Pikachu goes fishing for Pokémon.

Little Lost Poliwag (Petit Ptitard perdu)

Pikachu finds five lost Poliwag and takes them back home. In the second part, at Poliwhirl‘s place, it has to drive out a Haunter with an electric attack.

The Piñata Game (Le jeu de la piñata)

Invited by Venusaur, Pikachu hits a Poké Ball filled with presents.

Treasure Hunt (Chasse au trésor)

On an island, Pikachu digs up many treasures.

The Pokémon in the game