Type/Type chart

The type chart has changed between generations of, most notably due to the inclusion of new types. The following are type charts for previous generations and details the changes made between them.

Between Generations I and II

 * The Dark and Steel types were introduced.
 * Bug was made ½× against Poison instead of 2×.
 * Poison was made to 1× against Bug instead of 2×.
 * Ghost was made 2× against Psychic instead of 0×.
 * Ice was made ½× against Fire instead of 1×.

Between Generations V and VI

 * The Fairy type was introduced.
 * Ghost and Dark were made 1× against Steel instead of ½×.