Gen 8 moves initial commit

Full credit to Nunuchu42 and cfmnephrite for this code.

asm/macros/battle_script.inc

@@ -1878,6 +1878,36 @@
 	.4byte \ptr
 	.endm
 
+	.macro trynoretreat battler:req, ptr:req
+	various \battler, VARIOUS_TRY_NO_RETREAT
+	.4byte \ptr
+	.endm
+
+	.macro trytarshot battler:req, ptr:req
+	various \battler, VARIOUS_TRY_TAR_SHOT
+	.4byte \ptr
+	.endm
+
+	.macro trynextdart ptr:req
+	various BS_ATTACKER, VARIOUS_TRY_NEXT_DART
+	.4byte \ptr
+	.endm
+
+	.macro checkpoltergeist battler:req, ptr:req
+	various \battler, VARIOUS_CHECK_POLTERGEIST
+	.4byte \ptr
+	.endm
+
+	.macro setoctolock battler:req, ptr:req
+	various \battler, VARIOUS_SET_OCTOLOCK
+	.4byte \ptr
+	.endm
+
+	.macro cutonethirdhpraisestats ptr:req
+	various BS_ATTACKER, VARIOUS_CUT_1_3_HP_RAISE_STATS
+	.4byte \ptr
+	.endm
+
 @ helpful macros
 	.macro setstatchanger stat:req, stages:req, down:req
 	setbyte sSTATCHANGER \stat | \stages << 3 | \down << 7