Pokémon Gold and Silver (pret/pokegold)

Gold and Silver already use the staged critical hit that Crystal keeps line for line: Focus Energy (+1), a high-critical move (+2), and a Scope Lens (+1) add to a critical level, which reads 17, 32, 64, 85, or 128 in 256 from CriticalHitChances. Chansey holding a Lucky Punch and Farfetch'd holding a Stick get level 2 at once and skip the other bonuses. pokegold/critical-chance

About: Pokémon Gold and Silver Critical hit

{
 "byLevel": [
  17,
  32,
  64,
  85,
  128
 ],
 "of": 256
}

Cited by: Critical hit, Pokémon Crystal, Pokémon Gold and Silver

Gold and Silver's BattleCommand_CheckHit, which Crystal keeps unchanged, subtracts a target's BrightPowder value (20) from the stage-scaled accuracy byte, lets a byte of 255 always hit, and otherwise hits on a random byte below it. pokegold/hit-test

About: Pokémon Gold and Silver Hit chance

Cited by: Held item, Hit chance

Gold and Silver's type chart file is the one Crystal ships, byte for byte, so the 17 types, Steel and Dark included, and Ghost's ×2 on Psychic date from Gold and Silver. pokegold/type-chart

About: Pokémon Gold and Silver Type effectiveness

Cited by: Pokémon Crystal, Pokémon Gold and Silver, Type effectiveness

Gold and Silver's BattleCommand_Stab, which Crystal keeps unchanged, applies the weather and badge type boosts and then STAB, $\mathrm{damage}+\lfloor \mathrm{damage}/2\rfloor$, before the type rows. pokegold/stab

About: Pokémon Gold and Silver Same-type attack bonus

Cited by: Same-type attack bonus

Gold and Silver's BattleCommand_DamageVariation leaves 0 or 1 damage alone and otherwise multiplies by a random byte, rotated, redrawn until it is at least 217 (85 percent + 1), and divides by 255 (100 percent); Crystal keeps the command unchanged. Their BattleCommand_DamageCalc differs from Crystal's only in comments and one doubling written sla a where Crystal has add a. pokegold/damage-variation

About: Pokémon Gold and Silver Damage formula

Cited by: Damage formula

Gold and Silver's BattleCommand_EndLoop, which Crystal keeps apart from a comment, loops back to the critical command for every hit of a 2–5-hit move, so each hit rolls its own critical and damage. pokegold/multi-hit

About: Pokémon Gold and Silver Multi-hit attack

Cited by: Multi-hit attack, Pokémon Gold and Silver

On each step, Gold and Silver's TryWildEncounter reads the map's encounter rate for the current time of day (morning, day, or night), or its water rate, doubles it for the Pokémon March or Ruins of Alph radio, halves it for the Pokémon Lullaby or a Cleanse Tag, and starts a battle when Random is below it; Crystal keeps this unchanged. pokegold/encounter-rate

About: Pokémon Gold and Silver Random encounter

Cited by: Pokémon Gold and Silver, Pokémon HeartGold and SoulSilver, Random encounter, Time of day

The time of day picks which of a grass area's three sets of 7 slots is used; a roll from 1 to 100 then picks a slot at 30, 30, 20, 10, 5, 4, and 1 percent, or one of 3 water slots at 60, 30, and 10 percent. Crystal's routine and table are the same. pokegold/encounter-slots

About: Pokémon Gold and Silver Random encounter

{
 "grass": [
  30,
  30,
  20,
  10,
  5,
  4,
  1
 ],
 "water": [
  60,
  30,
  10
 ],
 "of": 100
}

Cited by: Pokémon Crystal, Random encounter

Gold and Silver set the time of day from the cartridge clock's hour, morning from 4:00 to 9:59, day from 10:00 to 17:59, and night from 18:00 to 3:59. pokegold/time-of-day

About: Pokémon Gold and Silver Time of day

{
 "morning": [
  4,
  10
 ],
 "day": [
  10,
  18
 ],
 "night": [
  18,
  4
 ]
}

Cited by: Pokémon Gold and Silver, Time of day

Gold and Silver's escape formula is Red and Blue's, $\lfloor 32P/(\lfloor E/4\rfloor mod256)\rfloor$ plus 30 for each earlier attempt against a random byte, with a held Smoke Ball that always escapes; Crystal adds two battle types, Celebi's and Suicune's, that block escape. pokegold/run

About: Pokémon Gold and Silver Fleeing

Cited by: Fleeing, Pokémon Gold and Silver

Gold and Silver order moves by priority, 3 for Protect and Endure, 2 for the priority-hit moves, 0 for Vital Throw and the force-switch, Counter, and Mirror Coat effects, and 1 for the rest; at equal priority a held Quick Claw goes first when a random byte is below its value, 60, about 23% of the time, and otherwise the higher Speed goes first, with a tie split evenly; Crystal keeps the routine. pokegold/turn-order

About: Pokémon Gold and Silver Turn order

{
 "quickClaw": 60,
 "of": 256
}

Cited by: Held item, Pokémon Gold and Silver, Turn order

Each Gold and Silver item record carries a held effect and a parameter, which battle code reads from the item a Pokémon holds; Quick Claw's is 60, BrightPowder's 20, Leftovers' 10, and Scope Lens's HELD_CRITICAL_UP has 0. pokegold/held-items

About: Pokémon Gold and Silver Held item

Cited by: Held item, Pokémon Gold and Silver

Rain Dance and Sunny Day each set their weather for 5 turns; in rain, Water moves do ×1.5 and Fire moves ×½, in sun the reverse, and rain halves SolarBeam. pokegold/weather

About: Pokémon Gold and Silver Weather

{
 "turns": 5
}

Cited by: Pokémon Gold and Silver, Weather