Red, Blue & Yellow Pokédex
The original games Pokémon Red, Pokémon Blue & Pokémon Yellow have a Pokédex of 151 Pokémon in the Kanto region.
They're shown below with the sprites from those games. Stats can be viewed on the Gen 1 Pokémon stats page.

Charmander
Fire

Charmeleon
Fire

Butterfree
Bug · Flying

Jigglypuff
Normal

Wigglytuff
Normal

Bellsprout
Grass · Poison

Weepinbell
Grass · Poison

Victreebel
Grass · Poison

Tentacruel
Water · Poison

Farfetch'd
Normal · Flying

Hitmonchan
Fighting

Kangaskhan
Normal

Electabuzz
Electric

Aerodactyl
Rock · Flying