Yes, I already know how to do that, but I want to make it look nice. I think the best way is to make it a walk-into event.
While I am working on it, it wasn't ready for christmas release, so I decided to include it on next release. Curiously enough, another of the "tile specials", that finds if a person is looking at a given location in the map, at a distance set by the view radius (that would allow you to replace the trainer scripts for one single walking script) was also not finished in time. But don't worry, for next release should solve the "patching erase my work" problem.
setvar 0x8006 0x0
loadpointer 0x0 @firstchoice 'your first multichoice text
special 0x25
setvar 0x8006 0x1
loadpointer 0x0 @secondchoice 'your second multichoice text
special 0x25
multichoice 0x0 0x0 0x20 0x0 'the two 0's, and then the position x and y
compare LASTRESULT 0x0 'if 1st choice goto
if 0x1 goto @firstchosen
compare LASTRESULT 0x1 'if 2nd choice goto
if 0x1 goto @secondchosen
compare LASTRESULT 0x7F 'if B was pressed goto
if 0x1 goto @BpressedCompiling a script to work with the walking scripts is the same as compiling it to work anywhere else. just put it on the ROM somewhere. Afterwards, change the 0s at 0x1a4e2c to the pointer to the script location.
Var 0x407e is the activate this script variable. If you want the script you just placed at 0x1a4e2c to be active, you must set the variable to 1, in the normal variable-setting fashion. Otherwise it won't run.
In here, just do it like if you were about to create a simple talk-to script that did that. So, my guess is that it would have a key check followed by a call if true to the script of the said function. Just don't forget about the small detail about the wild battles, as that script sounds like the kind that never turns off, and to set the help option off, as it will always activate before the script.