ItemDex/RB:115

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Name (transcribed): ;MP-

Identifier (HEX): 73
Identifier (DEC): 115
Effect pointer: 00:3c49 (ROM 0)
Unterminated name glitch item?: No
Tossable/Sellable?: Yes
Buy Price: 955081
Sell Price: 477540
Name bytes: $9d, $8c, $8f, $e3, $50

(hex:73) is a glitch item in Pokémon Red and Blue.

Its name is taken from mojibake of Pokémon Red/Green's untranslated "マスター" (Master) string. "マスター" (Master) is also the hex:73 glitch item in Japanese versions.

Using it both in and outside of battle causes a glitch text box to appear that cannot be exited, and eventually crashes the game.

This is because the item calls function 00:3c49 (PrintText) with the address $3c49 in hl, which interprets the PrintText function itself as text commands. After 1 or 2 sound commands, this eventually runs into the command text_ram $25ea, which prints $25ea to $2649 to the textbox ($c4b9 internally).

After some more sound commands it then reaches command text_ram $c4b9, which prints text from $c4b9 into the textbox starting from $c4ed (where the other command stopped printing) until it finds a terminator, which was never printed. This causes an infinite copy that overwrites memory and causes the crash.


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