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==Changes==
==Changes==
Besides translating the game, a few other changes were made. The most notable was the removal of the ability to name the protagonist as well as the ability to nickname any Denjuu that the player befriends. The player is always named "Bek", and all befriended Denjuu are automatically nicknamed to shortened forms of their species' names. This change was made likely because the name input was designed to work with Japanese kana, as opposed to the Latin alphabet, and the bootleggers did not know how to edit the characters for the name input.
Besides translating the game, a few other changes were made. The most notable was the removal of the ability to name the protagonist as well as the ability to nickname any Denjuu that the player befriends. The player is always named "Bek", and all befriended Denjuu are automatically nicknamed to shortened forms of their species' names. This change was likely made because the name input was designed to work with Japanese kana, as opposed to the Latin alphabet, and the bootleggers apparently did not know how to edit the characters for the name input.


Another change was that the real time clock was removed probably to save money. When an emulator is paused, sped up, or slowed down, the clock will pause, speed up or slow down as well. The clock will also stop when the game is switched off. In the original games, the clock always runs at a constant speed regardless of an emulator or gaming device. Each second in the original games passes after every 60 frames, whereas each second in the bootlegs passes after every 50 frames instead, which means the clock runs faster in ''Diamond/Jade'' than in ''Power/Speed''.
Another change was that the real-time clock was removed, and replaced with a clock that functions only while the game is running. This is likely because including a real-time clock may have made the cart more expensive, or because real-time clocks rely on a battery to work properly.


Finally, the Smilesoft, Comic BomBom, and Natsume logos, as well as the opening credits, were removed, and the game jumps straight to the title screen instead. Similarly, the credits at the end of the game were removed, although the "THANK YOU FOR YOUR PLAYING!" text was kept, albeit modified slightly. In general, it is common for bootleg carts to remove credits.
Finally, the Smilesoft, Comic BomBom, and Natsume logos, as well as the opening credits, were removed, and the game jumps straight to the title screen instead. Similarly, the credits at the end of the game were removed, although the "THANK YOU FOR YOUR PLAYING!" text was kept, albeit modified slightly. In general, it is common for bootleg carts to remove credits.
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==Bugs and Glitches==
==Bugs and Glitches==
{{main|Glitches}}
{{main|Glitches}}
The bootlegs contain numerous glitches:
The bootlegs contain numerous glitches in addition to those present in the base game, adding to their widespread infamy.
*Pressing A+B+Select+Start simultaneously crashes the game, whereas on most Game Boy or GBC games this produces a soft reset. The reset routine is implemented by the cartridges themselves; given that the bootlegs instead crash, this routine was likely damaged in the translation process.
 
*Dialing secret numbers crashes the game.
*Dialing secret numbers causes the bootlegs to crash. Hence, secret Denjuu cannot be obtained without cheat codes.
*Selecting "Prop" when there are no items crashes the game.
*Selecting "Prop" when there are no items causes the bootlegs to crash.
*Pressing any button after the Game Over screen crashes the game.
*Pressing A+B+Select+Start simultaneously causes the bootlegs to crash. On most Game Boy games (not just ''Telefang''), this produces a soft reset. The reset routine is implemented by the cartridges themselves; given that the bootlegs instead crash, this routine was likely damaged in the process of creating them.
*Rapidly pressing B in the phone menu sometimes crashes the game.
*Pressing any button after the Game Over screen causes the bootlegs to crash.
*Rapidly pressing B in the phone menu sometimes causes the bootlegs to crash.
*The color palette in the opening sequence is incorrect. This glitch is caused by the removal of the logos that precede the title screens.
*The color palette in the opening sequence is incorrect. This glitch is caused by the removal of the logos that precede the title screens.
*When custom tunes are played, screeching noises are often heard.
*When custom tunes are played, screeching noises are often heard.
*On Ion Island, there is a glitch that sometimes causes the door to lock after beating Gypsophi.
*On Ion Island, there is a glitch that sometimes causes the door to lock after beating Gypsophi.
*On some carts, vases cannot be picked up after saved data is reloaded.
*On some carts, vases cannot be picked up after saved data is reloaded. On some ROMs or cartridges, though, saved data cannot be loaded at all; in those cases, this glitch may not matter.
*When playing the game on the original Game Boy, the title screen will be invisible until the Start button is pressed, at which point it darkens and becomes visible briefly. The phone menu screen will also display a dark background around the letters.
*When playing the game on the original Game Boy, the title screen is invisible until the Start button is pressed, at which point it darkens and becomes visible briefly. The phone menu screen will also display a dark background around the letters.
*If the saved data is corrupt, the error screen that appears has incorrect color palettes for each tile. This is because they are unchanged from the title screen (although the colors themselves change). Some of these palettes are completely white, causing Crypto to be covered in white squares. Where Crypto is visible, he often has incorrect color palettes in certain parts. Since the title screens are different between Diamond and Jade, the tiles on the error screen will have different colors between the two versions. This glitch, like the glitch that causes incorrect color palettes on the intro screen, is caused by the removal of the Smilesoft, Natsume, and Comic BomBom logos. Since the issue is palette related, the glitch doesn't occur on a monochrome Game Boy. The message (which is still visible in both versions) is also completely untranslated from Japanese.
* If the saved data is corrupt, the error screen that appears has incorrect color palettes for each tile. This is because they are unchanged from the title screen (although the colors themselves change). Some of these palettes are completely white, causing Crypto to be covered in white squares. Where Crypto is visible, he often has incorrect color palettes in certain parts. Since the title screens are different between Diamond and Jade, the tiles on the error screen will have different colors between the two versions. This glitch, like the glitch that causes incorrect color palettes on the intro screen, is caused by the removal of the Smilesoft, Natsume, and Comic BomBom logos. Since the issue is palette related, the glitch doesn't occur on a monochrome Game Boy. The message (which is still visible in both versions) is also completely untranslated from Japanese.
*Personalities and statuses often have nonsensical text, or are blank. This is because the Japanese games used an 8-character limit for personalities and a 4-character limit for statuses, but the bootlegs acted as if there was a 16-character limit for each.
<gallery widths=160px heights=144px>
<gallery widths=160px heights=144px>
File:Pokemon Diamond save corruption.png|Save corruption screen in Pokémon Diamond.
File:Pokemon Diamond save corruption.png|Save corruption screen in Pokémon Diamond.
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===Save Issues===
===Save Issues===


Most copies of the bootlegs are unable to load a saved game. While commonly misbelieved to be a bug, this is in fact a result of an anti-piracy measure. The cartridges use custom hardware similar to MBC3, but use RTC-like registers not present on licensed MBC3 cartridges. The anti-piracy measure uses obfuscated code that is executed when the player attempts to load a saved file, and this code will only allow the file to load on this custom hardware.
Most bootlegs are unable to load a saved game. While commonly misbelieved to be a bug, this is in fact a result of an anti-piracy measure. The cartridges use custom hardware similar to MBC3, but use RTC-like registers not present on licensed MBC3 cartridges. The anti-piracy measure uses obfuscated code that is executed when the player attempts to load a saved file, and this code will only allow the file to load on this custom hardware.


If the player attempts to load a save on either some ROM files or on standard MBC3 hardware, the game will freeze. On flashcarts, such as the Everdrive series, the game will instead, after several minutes, reset to the title screen with a glitched palette, since the game now thinks that it is run on a monochrome Game Boy.
If the player attempts to load a save on standard MBC3 hardware on a real Game Boy or most emulators, the game will hang for several minutes with a frozen sound effect. After several minutes, the game will hang further in silence. On flashcarts, such as the Everdrive series, the game will instead, after several minutes, reset to the title screen with a glitched palette, since the game now thinks that it is run on a monochrome Game Boy. (It is possible, but unproven, that this also occurs on physical cartridges too.)
An example of an emulator which supports these bootlegs is [https://hhug.me/?post=88 hhugboy].
An example of an emulator which supports these bootlegs is [https://hhug.me/?post=88 hhugboy].


Selecting "Contin[ue]" on some ROMs, emulators or cartridges will not freeze the games but instead cause them to act as if the data is absent.
Some emulators act if the save is not even present, where selecting "Contin[ue]" will have no effect.
 
Even when the save cannot be loaded, the save is still present. Via emulation, one can load a saved file from ''Diamond'' in ''Power'' or a saved file from ''Jade'' in ''Speed''; it will work correctly, but the names of all befriended Denjuu will be glitched.


Even when the save cannot be loaded, the save is still present. Via emulation, one can load a saved file from ''Diamond'' in ''Power'' or a saved file from ''Jade'' in ''Speed''; it will work correctly aside from the names of all befriended Denjuu being glitched.
In the case of a cartridge, this can be fixed by unscrewing the back, and carefully replacing the CR2032 battery. This method is very simple with the original Game Boy cartridge version that says "GAME" at the top, as it has a Philips screw and a slot for the battery to easily slide in.{{verify source}}


===Dumping Issues===
===Dumping Issues===
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