Add meaningful aliases for wd265

Introduce MONICON_* constants
Introduce BATTLEPLAYERACTION_* constants

constants/battle_constants.asm

@@ -63,8 +63,8 @@ MOVE_LENGTH EQU const_value
 	const STAT_SATK
 NUM_EXP_STATS EQU const_value + -1
 	const STAT_SDEF
-NUM_STATS EQU const_value +- 1
-STAT_SPC EQU STAT_SATK
+NUM_STATS EQU const_value + -1
+NUM_BATTLE_STATS EQU NUM_STATS + -1 ; don't count HP
 
 ; stat formula constants
 STAT_MIN_NORMAL EQU 5
@@ -244,6 +244,12 @@ SUBSTATUS_CURLED EQU 0
 	const BATTLEACTION_E
 	const BATTLEACTION_FORFEIT
 
+; wBattlePlayerAction
+	const_def
+	const BATTLEPLAYERACTION_USEMOVE
+	const BATTLEPLAYERACTION_USEITEM
+	const BATTLEPLAYERACTION_SWITCH
+
 ; wBattleResult
 	const_def
 	const WIN

constants/icon_constants.asm

@@ -39,3 +39,13 @@
 	const ICON_SLOWPOKE
 	const ICON_SUDOWOODO
 	const ICON_BIGMON
+
+; LoadMenuMonIcon.Jumptable indexes (see engine/gfx/mon_icons.asm)
+	const_def
+	const MONICON_PARTYMENU
+	const MONICON_NAMINGSCREEN
+	const MONICON_MOVES
+	const MONICON_TRADE
+	const MONICON_MOBILE1
+	const MONICON_MOBILE2
+	const MONICON_UNUSED