Introduction

Categories

• Aims for the fastest completion time
• Heavy luck manipulation
• Executes arbitrary code

About the run

Version choice

• Faster luck manipulation of the Trainer ID: This run depends on having a specific Trainer ID, which is faster to get in Silver by 14 frames.
• Different sprites: Pokémon sprites are different in Gold and Silver, which has no real time implications (some load a frame faster than others, but nothing significant), but helps making the run more enjoyable to watch for everyone who saw the previous submissions and doesn't want to see the exact same images all over again.
• "Because I can": Silver has been ignored to an extend where some people asked whether the Coin Case glitch is even possible in Silver. Here is your answer.

Coin Case Glitch improvements

Move 3  Move 4  Trainer ID    Code
  21      BD      D8 E9       ld hl,D8BD; jp (hl)

  21      00      D9 E9       ld hl,D900; jp (hl)

Input    opcode                     operation    comment
0x48     (0xb3 xor 0x48 = ) 0xfb    ei           Does nothing important.
0x22     (0x48 xor 0x22 = ) 0x6a    ld l,d       loads d=0x22 into l

Joypad     Command
e1                           // Initial value of d when entering the loop
e8         09 (add hl,bc)    // d900 + 00a4 = d9a4
cd         25 (dec h)
e0         2d (dec l)
97         77 (ld (hl),a)    // d8a3 <- 0; Enable Red in Mt. Silver
b3         24 (inc h)
48         fb (ei)           // setup cycle
22         6a (ld l,d)
06         24 (inc h)
71         77 (ld (hl),a)    // da22 <- 0; Having no Pokémon in your party wins all battles instantly
b0         c1 (pop bc)       // setup cycle
d2         62 (ld h,d)
61         b3 (or e)         // setup cycle
0b         6a (ld l,d)
04         0f (rrca)         // setup cycle
76         72 (ld (hl),d)    // d20b <- 76; Change tile the character stands on, needed for warping
63         15 (dec d)        // setup cycle; This temporarily corrupts d, but it is fixed in the next cycle
19         7a (ld a,d)
bb         a2 (and d)        // setup cycle; 0xbb and 0x19 = 0x19
d9         62 (ld h,d)
fb         22 (ld (hl+),a)   // d90b <- 19; Y coordinate of the character position
79         82 (add d)        // setup cycle
03         7a (ld a,d)
21         22 (ld (hl+),a)   // d90c <- 03; X coordinate of the character position
65         44 (ld b,h)       // setup cycle
17         72 (ld (hl),d)    // d90d <- 17; (Glitch) map entrance 0x17, directly in front of Red
34         23 (inc hl)
16         22 (ld (hl+),a)   // d90e <- 03; Map group
0c         1a (ld a,(de) )   // setup cycle
46         4a (ld c,d)
36         70 (ld (hl),b)    // setup cycle
44         72 (ld (hl),d)    // d90f <- 44; Map index: In Mt. Silver
2d         69 (ld l,c)
71         5c (ld e,h)       // setup cycle
0b         7a (ld a,d)
29         22 (ld (hl+),a)   // d946 <- 0b; Set warp pointer to our fake warp data
5d         74 (ld (hl),h)    // d947 <- d9
79         24 (inc h)        // setup cycle
81         f8 (ld hl, sp+f5)
eb         6a (ld l,d)
12         f9 (ld sp,hl)     // Fix the stack pointer; leave directly to the overworld
db         c9 (ret)          // Return to normal game code

Route details and improvements

Intro

• I set the text speed to fast, turn off battle animations and set the battle style to "SET" to make the overall game play faster.
• The Trainer ID is manipulated to be 0xD9E9, which is important for the Coin Case glitch setup.
• Date and time are irrelevant to the route, using the defaults is the fastest.
• I name the player "A". Like in Gen I, each character printed on the screen cost one frame, making shorter names faster. Also, "A" and all characters which are only one button press away (namely "B", "I", "J" and "a") cost no extra frames to input.

New Bark Town

• Totodile's DVs don't need to be very specific for this run, 14 Attack, 6 Defense, 8 Speed and 15 Special suffice to kill everything as fast as possible. I got 10 Defense and 15 Speed instead, oh well.

Cherrygrove City

• Rival's Chikorita has 21 HP, Scratch does 5 HP and a critical hit 8 HP of damage. That means it can be killed with two crits and a non-crit (doing non-crits is faster since the "Critcal Hit!" message costs time). Like in Gen I, however, getting max damage out of a move has a significantly lower chance (1/39) than any other value, due to the way integer rounding is done. That means that max crits have a 1/624 (= 1/16 * 1/39) chance of happening. Being able to perform these max damage attacks will save time in multiple fights throughout the run.
• Poison warping is not used, since is costs more time than it gains. It saves 00:03.72s to do, but you miss out on getting Pokéballs, which are important and take longer to pick up (00:05.76s) later or buy in a mart (00:13.56s).

Violet City

• The AI of Bird Keepers forces them to use a damaging move whenever possible, so taking damage from Spearow's Peck and Pidgeotto's Gust is unavoidable.
• Falkner's Pidgey could be killed using only two Rage crits, but using three noncrits allows a OHKO on Pidgeotto and is therefore faster.
• After beating Falkner, the Boxes are renamed to spell out the program for the Coin Case glitch.
• Togepi's DVs are manipulated to be 0x18A9, which sets up a relative jump (jr a9) needed in the Coin Case glitch. There are plenty of other values that would work as well, since it's not important where we land exactly.
• I skip visiting the mart; again, it costs more time than using X-Attack in battles save. I also don't need to buy a Pokéball since I skipped poison warping.

Route 32

• After beating Albert, a wild Bellsprout is encoutered to create its PokéDex entry. It is later needed to trigger the Coin Case glitch.

Union Cave

• Using Rage is the fastest way to beat Russell's Geodudes without X-Attacks.

Slowpoke Well

• I catch a Slowpoke in Slowpoke Well, since it (along with Rattata) knows exactly 3 moves including Tackle, which is needed for the Coin Case glitch setup. Because of very technical details (a carry flag being set or not at the right time), Rattata does not work with the setup I'm using.
• The final Rocket's Koffing is another example of saving a crit and therefore time by hitting max crits.

Azalea City

• Without X-Attacks, beating the arena before the rival is way faster (it may even be faster when using X-Attacks as well).

Ilex Forest

• When hunting Farfetch'd, the route used here is not the shortest route in terms of steps, but it is faster by around 1.5 seconds (assuming you get no encounters of course).
• Cut is taught to Croconaw. Ideally, you would want to teach it to your caught Pokémon which hasn't got four moves already, but there is no convenient Pokémon that can learn both Tackle and Cut (Sentret is the closest to it, but it has only one move when caught and teaching it 2 moves takes longer than teaching Cut to Croconaw).
• Slowpoke's moves are swapped and it is switched with Togepi while we are in the menu for using Cut anyway, which saves time.

Goldenrod City

• Super Nerd Eric is the last trainer before finally getting the Coin Case and performing the glitch. Cut is used to OHKO the Grimers, its shorter name makes it faster than the other moves.
• The text box for picking up the Coin Case resets the BG map window, so taking 3 steps to the left puts us in the right position to enable the needed jump when activating the Coin Case.
• Bellsprout's cry is played by checking the PokéDex and the Coin Case glitch is triggered.
• Due to the executed code, there now is a warp to Mt. Silver directly to our left, so by walking to the left we end up in Mt. Silver right in front of Red. Also, because we returned directly to the overworld without leaving the item menu first, the screen is not redrawn and we see the item menu instead of the overworld until the map transition is done.
• When talking to Red, the fight is skipped since the game thinks we have no Pokémon in our party, and the credits roll.

Route frame differences