start working on use pokeblock

src/use_pokeblock.c

@@ -0,0 +1,35 @@
+#include "global.h"
+#include "main.h"
+#include "pokeblock.h"
+#include "malloc.h"
+
+struct UsePokeblockSubStruct
+{
+    void *field_0;
+    void (*callback)(void);
+    struct Pokeblock *pokeblock;
+};
+
+struct UsePokeblockStruct1
+{
+    u8 field_0[0x7FD0];
+    struct UsePokeblockSubStruct info;
+};
+
+extern struct UsePokeblockStruct1 *gUnknown_0203BCAC;
+extern struct UsePokeblockSubStruct *gUnknown_0203BC90;
+
+// this file's functions
+void sub_816636C(void *arg0);
+void sub_8166380(void);
+void sub_816631C(void);
+
+void sub_8166204(struct Pokeblock *pokeblock, void (*callback)(void))
+{
+    gUnknown_0203BCAC = AllocZeroed(0x806C);
+    gUnknown_0203BC90 = &gUnknown_0203BCAC->info;
+    gUnknown_0203BC90->pokeblock = pokeblock;
+    gUnknown_0203BC90->callback = callback;
+    sub_816636C(sub_8166380);
+    SetMainCallback2(sub_816631C);
+}