This adds Wonder Trades to Fire Red.
The NPC trainers are used as the source of these Pokemon; you might end up with Blaine's Rapidash, for example, complete with Blaine's OTID and OT Name and custom moveset.
First, you need to insert dtan to your ROM. Then, copy the output rom test.gba to this project's root directory, renaming it rom.gba.
Open up config.ini and modify free-space so that the build system knows where to start looking for free space in your ROM.
Once you've configured everything, you can check here for build instructions.
Once it has been inserted, it won't actually /do/ anything. You'll have to execute the associated script to actually do a Wonder Trade.
First, you need to find out where the script was inserted. If you're in a Unix-like environment, you can just do cat test.sym | grep wonder_trade_script. Otherwise, just open test.sym in a text editor and look for wonder_trade_script; the offset beside it was where it was inserted to.
Then, you can assign it to a person/signpost event or even an item, just like any other script.