Use misc ScrCmd constants

asm/macros/event.inc

@@ -902,15 +902,15 @@
 	.4byte \text
 	.endm
 
-	@ Gives the player one of the specified (species) Pokemon at level level holding item. The unknown arguments should all be zeroes.
-	.macro givemon species:req, level:req, item:req, unknown1:req, unknown2:req, unknown3:req
+	@ Gives the player one of the specified (species) Pokemon at level level holding item. The trailing 0s are unused parameters
+	.macro givemon species:req, level:req, item:req
 	.byte 0x79
 	.2byte \species
 	.byte \level
 	.2byte \item
-	.4byte \unknown1
-	.4byte \unknown2
-	.byte \unknown3
+	.4byte 0x0
+	.4byte 0x0
+	.byte 0
 	.endm
 
 	.macro giveegg species:req