Automatically play the slot machine in Pokémon FireRed/LeafGreen (and maybe others) running on Android in an emulator.

pokemon-slots-android.sh

#!/bin/sh
# Automatically play the slot machine in Pokémon FireRed/LeafGreen (and maybe others) running on Android in an emulator.
#
# REQUIREMENTS:
# - Android device with pokemon in suitable emulator e.g. John GBA / John GBAC
# - PC with:
#   - POSIX compliant shell (duh)
#   - adb installed and in PATH
# 
#
# SETUP:
# 1. Enable USB debugging on your Android device
# 2. Connect the Android device to the PC via USB
# 3. Make a preliminary connection by running `adb shell ls` or something similar to verify access form the PC
# 4. EITHER Set up a hardware mapping in your emulator to use KEYCODE_DPAD_DOWN for D-pad Down and KEYCODE_A for the A button.
#    OR Change this script to match a hardware mapping of your emulator
#    Note: If you have a mechanism where you can "record" a keypress, 
#          you can manually run the adb commands from the script below to record them.
#
# USE:
# 1. Start the game in the emulator
# 2. Start the slot-machine minigame
# 3. Put the emulator in turbo mode to speed up the process
# 4. On the PC start this script
# 5. Abort the script once you have enough coins (e.g. Ctrl+C to SIGINT)
#
# NOTES: 
# My emulator doesn't buffer input event, and misses a lot of events, even when playing normally.
# Therefore the default magnitude is 15, which means it presses the buttons 15 times in a row.
# If your emulator buffers events perfectly, you should run the script with 3 as argument
# which will only perform the exact button sequence necessary. (3×D-pad down, 3×Button A)
#
# TRIVIA:
# My credits just maxed out as I finished refactoring and documenting this script

if [ "$1" = '-h' ] || [ "$1" = '--help' ]
then
  cat << EOF
USAGE: $0 [-h] [MAGNITUDE]

  MAGNITUDE     Times to repeat each keypress in the sequence. Default: 15
  -h            Print this text
EOF
  exit 1
fi

magnitude=${1:-15}
echo "MAGNITUDE ${magnitude}"

while true
do
  # SMAH DOWN
  for i in $(seq $magnitude)
  do
    adb shell input keyevent KEYCODE_DPAD_DOWN
  done
  # SMASH A
  for i in $(seq $magnitude)
  do
    adb shell input keyevent KEYCODE_A
  done
done