through sub_815A008

ld_script.txt

@@ -257,6 +257,7 @@ SECTIONS {
         src/quest_log_8150454.o(.text);
         asm/dodrio_berry_picking.o(.text);
         asm/battle_controller_pokedude.o(.text);
+        src/unk_8159F40.o(.text);
         asm/unk_8159F40.o(.text);
         asm/teachy_tv.o(.text);
         asm/unk_815C27C.o(.text);