Text move abuse
Text move abuse is an arbitrary RAM modification glitch in Generation I. It exploits text command 03 to print text to any specified destination, serving as a memory copier (similar to connection copier).
Steps
- On the current map, redirect wMapTextPtr (item 40 quantity and item 41) to another location. For this example, we will be using x29 and TM11 (1ED3 (1DD3 in Yellow); the first inventory item) and Route 1.
- At the new location, NPC 1 will be the first two-byte pointer (i.e. the item and quantity at 1ED3 (1DD3 in Yellow)), NPC 2 will be the second two-byte pointer (i.e. the item and quantity at 1FD3 (1ED3 in Yellow)), and so on. In this case, the NPC who gives the Potion is NPC 1; so 1ED3/1DD3 (item 1 and item 1 quantity) will represent the text source of NPC 1. For this example, have item 1 as Thunder Stone x 211 (22 D3 (Red/Blue) or 21 D3 (Yellow).
- At the text source for the given NPC; represent text which uses text command 03. (Great Ball at item 3 in this case). Follow this the desired destination pointer with 00, desired bytes (other than text control characters) and 57. The bytes repesenting the text will be moved to the destination pointer. As an example, 03 59 (58 in Yellow) D0 00 15 57 (Great Ball x88, TM08 x 0 and BoulderBadge x 87) will move a single 15 to D059 (D058 in Red/Blue) (instant encounter with a Pokémon); resulting in a battle with Mew. Add more data before the 57 to copy more bytes (e.g. 03 59 (58 in Yellow) D0 00 15 16 57 writes 15 to D059/8 and 16 to D05A/9. Text control characters (in-text) cannot be copied, but for control characters that print text, the derived text will (e.g. control character 4A will copy E1 (Pk) and E2 (Mn).
See also
Credits
- Text move abuse was mentioned by luckytyphlosion in this TASVideos submission. The instructions in this article on how to use it were provided by Evie.
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