Why do articuno, zapdos, and moltres have numbers in their name?

Question

The numbers are in Spanish.

Uno=1
Dos=2
Tres=3

Comments

Hey my comment went into the answer.

Answer 1

There is no real reason, it is just something that Gamefreak decided to do. It also helps tell you their order in the Pokedex. Articuno, Zapdos, then Moltres.

Comments

maybe cuz articuno is the first one and zapdos the second and moltres the third .