Pokesay is a pokemon themed command-line app inspired by cowsay, written in JavaScript.
Pokesay requires a node installation. Run:
npm i -g pokesay
pokesay "<your message here>"
You can also specify a pokemon name parameter (supported pokemon list)
pokesay "<your message here>" <pokemon name>
where "pokemon name" can be "bulbasaur", "charmander", "squirtle", "blastoise, "eevee", "gengar", "jigglypuff", "psyduck", "snorlax" (or "pikachu", by default).