Pokémon Snap/Walkthrough

Pokémon
Here are all Pokémon featured in the game, organized by the levels they appear in.

Beach

 * Butterfree
 * Pidgey
 * Pikachu
 * Meowth
 * Doduo
 * Chansey
 * Kangaskhan
 * Scyther
 * Magikarp (who, interestingly enough, appears in all other levels, excluding Rainbow Cloud.)
 * Lapras
 * Eevee
 * Snorlax
 * Pokémon Sign: Kingler (rock formation shaped like the Pokémon)

Tunnel

 * Kakuna
 * Pikachu
 * Diglett
 * Dugtrio
 * Magnemite
 * Magneton
 * Haunter
 * Electrode
 * Electabuzz
 * Magikarp
 * Zapdos
 * Zubat
 * Pokémon Sign: Pinsir (shadow formed by electric lights)

Volcano

 * Charmander
 * Charmeleon
 * Charizard
 * Vulpix
 * Growlithe
 * Arcanine
 * Rapidash
 * Magmar
 * Magikarp
 * Moltres
 * Pokémon Sign: Koffing (smoke from a volcano crater)

River

 * Bulbasaur
 * Metapod
 * Pikachu
 * Vileplume
 * Psyduck
 * Poliwag
 * Slowpoke
 * Slowbro
 * Shellder
 * Cloyster
 * Magikarp
 * Porygon
 * Pokémon Sign: Cubone (tree shaped like the Pokémon)

Cave

 * Bulbasaur (actually transformed Ditto)
 * Pikachu
 * Jigglypuff
 * Zubat
 * Weepinbell
 * Victreebel
 * Grimer
 * Muk
 * Koffing
 * Jynx
 * Magikarp
 * Ditto
 * Articuno
 * Pokémon Sign: Mewtwo (constellation)

Valley

 * Squirtle
 * Sandshrew
 * Sandslash
 * Mankey
 * Geodude
 * Graveler
 * Goldeen
 * Staryu
 * Starmie
 * Magikarp
 * Gyarados
 * Dratini
 * Dragonite
 * Pokémon Sign: Dugtrio (mountain shaped like the Pokémon)

Rainbow Cloud

 * Mew