3. Go to Cerulean to the Nugget Bridge. Make it so the first trainer is off the screen, but if you go up one space, he will be there. Now go up the one space while holding start. When the start menu pops up......
4. This works only when you haven delivered oaks parcel. Have the parcel with out. Now go into Viridians PokeMart, but dont talk to the clerk. Go infront of the clerk, though. Look at the lowest man in the building. As soon as he walks all the way to the bottom of the building, press A so you talk to the clerk.
Get on cycling road without a bike
To do this, go to Celadon City, and walk to Cycling Road. Make sure you dont have your bike with you. Go into the building, and walk to the left along the top edge. Go to the left, and keep pressing B and the left button. Even when the lady is talking to you.
Cycling Road Glitch
Go to where I am in this photo. Now ride down a little bit, and ride back up. There should be water there now.
Ditto Secret Attack Make sure you have Max Ether/Ether and PP up
Now, have a ditto with you. Make sure it is at the top of your pokemon party thing. Go to Cerulean, and walk up above the Nugget Bridge. Now go all the way to the left, and go down into the grassy area over there. Wait until you face a Pidgey. Now use Transform. When its your turn again, press Select on the last move, and select on the first move. Now either kill the pidgey or run, I dont remember. Now use your PP Up on Ditto's first move, called Cooltrainer. Then use Ether/Max Ether on it. Now get in a battle, and use it.
Get past Ghost in Pokemon Tower with out Silph Scope
Really, all you have to do it use a Pokedoll on it, and it runs away.
Invisible PC
Go to Celadon, and go to inside the mansion.
Go all the way to the right hand side corner, above the plant. Go up one, and press A. It will act like a computers there.
Inside Pokeball
There are two ways of doing this.
Go to Celadon Game Corner, to this guy.
Battle him and beat him. Now go to him, on the SAME SIDE as you are in the picture, and talk to him.
You can barely see it, but you are on a pokeball.
2. The second one, you have to still be in the game corner, but this time, go BEHIND Giovanni. Battle him, and beat him, once he leaves, you are on top of a pokeball that contains the Silph Scope.
Stand on Tree
Go to any cut downable tree, and cut it down. Go to where the tree was, and save the game. Now turn it off and back on again, and now you are standing on that tree.
Unknown Dungeon: Walk on walls.
I'm not going to into description on this one, for they are hard to explain. So I will just show you the pictures.
Disappearing Man
Go to the Rocket Game Corner in Celadon City and find the woman who says that the slot machines have different odds. Stand in front of the slot machine directly above her, and keep an eye on the upper most guy on the right side of the screen. Now, press A. When it asks if you want to play the slot machine, say yes. That guy will vanish into thin air!
4. This works only when you haven delivered oaks parcel. Have the parcel with out. Now go into Viridians PokeMart, but dont talk to the clerk. Go infront of the clerk, though. Look at the lowest man in the building. As soon as he walks all the way to the bottom of the building, press A so you talk to the clerk.
Get on cycling road without a bike
To do this, go to Celadon City, and walk to Cycling Road. Make sure you dont have your bike with you. Go into the building, and walk to the left along the top edge. Go to the left, and keep pressing B and the left button. Even when the lady is talking to you.
Cycling Road Glitch
Go to where I am in this photo. Now ride down a little bit, and ride back up. There should be water there now.
Ditto Secret Attack Make sure you have Max Ether/Ether and PP up
Now, have a ditto with you. Make sure it is at the top of your pokemon party thing. Go to Cerulean, and walk up above the Nugget Bridge. Now go all the way to the left, and go down into the grassy area over there. Wait until you face a Pidgey. Now use Transform. When its your turn again, press Select on the last move, and select on the first move. Now either kill the pidgey or run, I dont remember. Now use your PP Up on Ditto's first move, called Cooltrainer. Then use Ether/Max Ether on it. Now get in a battle, and use it.
Get past Ghost in Pokemon Tower with out Silph Scope
Really, all you have to do it use a Pokedoll on it, and it runs away.
Invisible PC
Go to Celadon, and go to inside the mansion.
Go all the way to the right hand side corner, above the plant. Go up one, and press A. It will act like a computers there.
Inside Pokeball
There are two ways of doing this.
Go to Celadon Game Corner, to this guy.
Battle him and beat him. Now go to him, on the SAME SIDE as you are in the picture, and talk to him.
You can barely see it, but you are on a pokeball.
2. The second one, you have to still be in the game corner, but this time, go BEHIND Giovanni. Battle him, and beat him, once he leaves, you are on top of a pokeball that contains the Silph Scope.
Stand on Tree
Go to any cut downable tree, and cut it down. Go to where the tree was, and save the game. Now turn it off and back on again, and now you are standing on that tree.
Unknown Dungeon: Walk on walls.
I'm not going to into description on this one, for they are hard to explain. So I will just show you the pictures.
Disappearing Man
Go to the Rocket Game Corner in Celadon City and find the woman who says that the slot machines have different odds. Stand in front of the slot machine directly above her, and keep an eye on the upper most guy on the right side of the screen. Now, press A. When it asks if you want to play the slot machine, say yes. That guy will vanish into thin air!
The closest thing, in England at least, is a machine you slot coins into, which fall onto a surface containing many other coins and, if you're lucky, push those out, or other such goodies. But we don't play pachinko in Pokemon, we play something that was probably a lot easier to program: slot machines.
Miscellaneous glitches of and
Amazing Man(Red and Blue only) | Cable Club escape glitch | Celadon looping map trick | Champion Blue music muting glitch | Coastal Flooding | Confusion and Substitute glitch | Cooltrainer move | Cycling based glitch maps | Escape sprite handling glitch | Evolve without an evolutionary stone(Red and Blue only) | Evolving Raichu(Red and Blue only) | Expanded item pack | Expanded Pokédex | Focus Energy glitch | Get stuck in a wall | Ghost Bicycle glitch | Glitch encounter system | Glitch City RAM Manipulation |Infinite Blaine Door | Introduction Nidorino glitch(Red and Blue only) | Invisible PCs(Red and Blue only) | Invisible tree glitch | Item stack duplication glitch | Mute the music in the Pokémon League | Partial trapping move link battle glitch | Pokémon Tower Pokédex glitch | PP underflow glitches | Recovery move glitch | Rival's effect | See a Ghost without a Silph Scope | Selfdestruct and Substitute glitch | Silph Co. PC Glitch | Slot machine glitch | Stand on a tree | Statue behavior glitch(Red and Blue only) | Super effective move AI flaw(Red and Blue only) | Super Glitch | Surf down glitch | Swift miss glitch | Transform assumption glitch | Transform Empty Move Glitch |Trick Zone | Vending machine purchase glitch |Walk around with only fainted Pokémon(Red and Blue only) | Walking lag glitch | Walk on water through Surf | Walking Pikachu happiness glitch(Yellow only) | Wild appeared! | ZZAZZ Glitch
(view, talk, edit)
Amazing Man(Red and Blue only) | Cable Club escape glitch | Celadon looping map trick | Champion Blue music muting glitch | Coastal Flooding | Confusion and Substitute glitch | Cooltrainer move | Cycling based glitch maps | Escape sprite handling glitch | Evolve without an evolutionary stone(Red and Blue only) | Evolving Raichu(Red and Blue only) | Expanded item pack | Expanded Pokédex | Focus Energy glitch | Get stuck in a wall | Ghost Bicycle glitch | Glitch encounter system | Glitch City RAM Manipulation |Infinite Blaine Door | Introduction Nidorino glitch(Red and Blue only) | Invisible PCs(Red and Blue only) | Invisible tree glitch | Item stack duplication glitch | Mute the music in the Pokémon League | Partial trapping move link battle glitch | Pokémon Tower Pokédex glitch | PP underflow glitches | Recovery move glitch | Rival's effect | See a Ghost without a Silph Scope | Selfdestruct and Substitute glitch | Silph Co. PC Glitch | Slot machine glitch | Stand on a tree | Statue behavior glitch(Red and Blue only) | Super effective move AI flaw(Red and Blue only) | Super Glitch | Surf down glitch | Swift miss glitch | Transform assumption glitch | Transform Empty Move Glitch |Trick Zone | Vending machine purchase glitch |Walk around with only fainted Pokémon(Red and Blue only) | Walking lag glitch | Walk on water through Surf | Walking Pikachu happiness glitch(Yellow only) | Wild appeared! | ZZAZZ Glitch
(view, talk, edit)
In Pokémon Red, Blue, and Yellow, there are playable slot machines in the Celadon Game Corner. The rules are apparently simple: The player needs to line up the same symbols on horizontal or diagonal lines (the set of available lines depends on the number of coins betted), and the player can stop the reels, one at a time, using the A button. In reality, the game may cause the reels to 'slip' after the A button press either to hinder or to help the player, and the rules for doing so are actually complicated, with many oddities that may or may not be glitches. (Together with the separate building for prize claims, this is comparable to how real life Japanese pachi-slots are played.)
Thanks to the disassembly, the actual behaviors of the slot machines in Generation I are completely understood, although at some places it may still be unclear whether they match the intended behaviors.
Overview
For each individual spin, the slot machine can be in one of three modes:Mode bad, which guarantees that the player cannot get any match in the available lines.Mode good, which allows the player to get matches of symbols other than sevens or bars.Mode super, which allows and actively helps the player to get matches of sevens and bars. Mode super is the only mode of the three that will persist between spins. It will only end when the player wins a reward of 100 coins (bars) or 300 coins (sevens), and in the latter case only with a probability of 50% (i.e. it still have a 50% chance to persist).In general, for each spin, the mode is set to mode good or mode super with probability 45/256 (~17.6%), with the probability of mode super further depending on which slot machine the player is playing on (see below). It is set to mode bad with probability 210/256 (~82.0%). There is also a chance of 1/256 (~0.4%) to enter a lucky streak which allows the player to play on mode good (but never mode super) for all the spins after this one, until the player wins 60 times.The function to set the mode, called before each spinThe lucky slot machine
Whenever the player enters the Game Corner, a random number between 0 ~ 31 is generated, and if it is 0, it has a 7/8 chance of becoming 1.More precisely, a random number between 0 ~ 255 is generated, it becomes 8 if it is less than 7, then it is divided by 8, discarding the remainder. See the function to generate the index of the lucky slot machine in the disassembly. Then, whenever the player plays on a slot machine, the number is compared with the index of that slot machine (0 ~ 35) plus one. If it matches, the chance of playing in mode super is set to 5/256 (~2.0%), and otherwise it is set to 2/256 (~0.8%).The function to set the chance of mode superEffectively, this means that every time the player enters the game corner, there is usually a 'lucky slot machine' among the machines with index 0 ~ 30. The lucky slot machine is most likely (15/256, ~5.9%) to be the one with index 0 (the rightmost, bottommost one), and cannot be the ones with index 31 ~ 35 (the bottom five in the leftmost column). The other ones all have a probability of 1/32 (~3.1%) to be lucky, including the ones occupied by an NPC, or otherwise unplayable ('Out of order', 'Out to lunch', or 'Someone's keys'). Finally, there is a tiny chance (1/256, ~0.4%) that the lucky slot machine is the nonexistent slot machine -1.
Reel stopping
The mode of the slot machine comes into play when the player presses the A button to stop a reel, as the reel may 'slip' after the A press depending on its position. The exact logic for stopping the reel also depends on which reel the player is stopping. Internally, the first two reels are programmed to slip 4 times unless a condition is met earlier, while the third reel can either slip up to 4 times to help the player get a match, or slip any number of times to prevent a match.First reel
In mode bad or mode good, the condition for the first reel to stop early is that the middle symbol is not a cherry. Since there are no two consecutive cherry symbols (in fact, there are no consecutive same symbols on any reel), that means the first reel will slip at most once.In mode super, the condition for the first reel to stop early is that any of the three symbols showing is a symbol with an internal value less than that of the seven symbol. Since the seven symbol has the lowest internal value of all symbols, this condition is in fact never satisfied, and the first reel will always slip by 4 positions.The condition for the first reel to stop early
Second reel
Pokemon Yellow Slot Machine Odds Jackpot
In mode bad or mode good, the condition for the second reel to stop early is that there must be a 'potential match' on the first two reels, i.e. two of the same symbols that may form a line if the third reel stops in a good position. The player's bet is not considered; for example, a diagonal potential match counts even if the player only betted 1 or 2 coins.In mode super, the condition for the second reel to stop early is that the potential match found
is of either sevens or bars, 
or that there is no potential match and the bottom symbol on the second reel is seven or bar.The condition for the second reel to stop earlyThird reel
In mode bad or mode good, the third reel will always slip to prevent a disallowed match, i.e. any match in mode bad, or a match of sevens or bars in mode good. There is no upper limit for the distance the reel has to advance this way; as an extreme example, hacking the game so that the reels contain all sevens will likely cause the game to softlock.The piece of code run after finding a matchIn addition, in mode good or mode super, the reel will slip up to 4 times if no match is found. This is not counting the number of slips done to skip disallowed seven or bar matches in mode good, so the total number of slips may exceed 4.The piece of code run after not finding a match
Notice that, due to the design of the reels, there can never be more than one match at any time.
Oddities
On the spin where the player enters the lucky streak, the actual mode stays as it is on the previous spin, which can be either mode bad or mode good (the mode is initialized to mode bad at the beginning of a sessionAll the memory addresses from $CD3D (wStoppingWhichSlotMachineWheel) to $CD50 (wSlotMachineBet) are zeroed, which included the mode flag at $CD4C.). If the mode happens to be mode good and the player wins, it will still count towards the 60 wins to end the lucky streak. There is a line of code to immediately end the lucky streak if the player wins a reward of 300 coins, but this seems to be impossible, because the lucky streak is mutually exclusive with mode super, and mode good doesn't allow matches of sevens. The probability distribution of the lucky slot machine is weird in multiple aspects. The fact that one machine is more likely to be lucky and some others have no chance might be intended, but the fact that it can be the nonexistent slot machine -1 seems certainly an off-by-one error. The fact that the first reel's early stop condition in mode super is never satisfied is most likely a bug. Presumably, the intention is that the reel should stop if a seven symbol is showing, but the developers mistakenly wrotejr c instead of Pokemon Yellow Slots
jr zPokemon Crystal Slot Machine
. The second reel's early stop condition in mode super is weird in two aspects. The 'bottom symbol on the second reel' condition seems like an accidental use of leftover variable, although it may also be intended since there are two instructions specifically making it the bottom symbolThese twodec de instructions make de point to the bottom symbol of the second reel instead of the top symbol, and they seem to serve no other purpose.. The 'sevens or bars' check is only for the first potential match found, in the order of 'bottom-bottom, bottom-middle, middle-middle, top-middle, top-top' (i.e. from bottom to top), which means a potential match of bars may be rerolled if it appears above a potential match of another symbol.