Stupid scripts that does this:

• Scrapes https://bulbapedia.bulbagarden.net/wiki/List_of_Pokémon_by_National_Pokédex_number
• Downloads the sprite PNGs to ./sprites
• Trims the PNGs using imagemagick
• Converts the PNGs to .cow files for cowsay into ./cows
• Converts the PNGs to .sh files for executables that will print to terminal. ./sh

• Elixir and Erlang installed
• img2xterm
• imagemagick

Start with iex -S mix

# Grab the PNGs first.
Pokesay.scrape()

# Then convert them to what you want.
Pokesay.generate_bash()
Pokesay.generate_cows()

or use the Mix tasks:

mix Generate bash
mix Generate bash overwrite
mix Generate cows

Once you have your generated Pokemon bash files, you can do nifty things like randomly print on when you open your terminal

# First copy the pokemon files into some more permanent location
cp -Rv ./sh ~/.pokesay

# in ~/.zlogin or ~/.bash_login
if [ -d "$HOME/.pokesay" ]; then
  source "$(find "$HOME/.pokesay" -type f | shuf -n 1)"
fi

There's another example committed here

https://github.com/possatti/pokemonsay