Combination of Decamarks 0x2007 and 0x88A6 for all Hoenn starter Pokémon (Ruby/Sapphire)
More information in the description below:
These kind of effects were shared by danny on Glitch City Laboratories Forums a long time ago https://forums.glitchcity.info/index.php?topic=7125.0
Theoretically you could trade the Decamark over from Emerald in some way, but this might not be possible. You can trade Eggs, but that to may freeze the game if they hatch.
I don't know whether a similar effect is possible with News Reporter Corruption in Emerald.
By viewing Decamark 0x2007's summary from page 2, you get to cause the starter script to reappear when you return to Littleroot Town, however you become a glitch gender (which glitch sprites) which causes battles to freeze.
Viewing Decamark 0x88A6 is a fix, however, you will become male if you were the female character.
So combining these two Decamarks allows you to obtain all starter Pokémon if used after you obtain one of the starter Pokémon. You can also give a nickname to the Pokémon in slot 1 even if it isn't the starter, and it is possible to nickname outsider Pokémon this way
Downsides (which you may be able to fix with another Decamark) include that your Pokédex and badges are wiped, various event data is corrupted, and you are given an extremely long player name, which causes scenes which display your name to take much longer. Overall as it currently stands, this is definitely not worth it arguably.
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