Identify `wPikachuSpawnStateFlags` and `wPikachuMapScriptFlags` bits, and `PIKAMOVEMENT_*` constants (#158)

- Rename `wd471` to` wPikachuSpawnStateFlags`, with `BIT_PIKACHU_SPAWN_*` bits
- Rename `wd492` to `wPikachuMapScriptFlags`, with `BIT_PIKACHU_MAP_*` bits
- Introduce `PIKAMOVEMENT_*` constants for `ApplyPikachuMovementData`
- Refactor `BillsHouse` scripts and Pikachu/Bill movement data

1 files changed, 34 insertions, 0 deletions

diff --git a/constants/pikachu_emotion_constants.asm b/constants/pikachu_emotion_constants.asm
index 98d0e6e2..41e5f7ba 100644
--- a/constants/pikachu_emotion_constants.asm
+++ b/constants/pikachu_emotion_constants.asm
@@ -224,3 +224,37 @@ MACRO pikapic_looptofinish
 	pikapic_waitbgmap
 	pikapic_jump .loop\@
 ENDM
+
+; wPikachuSpawnStateFlags bits
+	const_def
+	const BIT_PIKACHU_SPAWN_0
+	const BIT_PIKACHU_SPAWN_1
+	const BIT_PIKACHU_SPAWN_2
+	const BIT_PIKACHU_SPAWN_3
+	const BIT_PIKACHU_SPAWN_4
+	const BIT_PIKACHU_SPAWN_FOLLOWING
+	const BIT_PIKACHU_SPAWN_SURFING
+	const BIT_PIKACHU_SPAWN_STARTER
+
+; wPikachuMapScriptFlags bits
+	const_def
+	const BIT_PIKACHU_MAP_PAUSE_IGT
+	const BIT_PIKACHU_MAP_SURF_SELECT
+	const BIT_PIKACHU_MAP_2
+	const BIT_PIKACHU_MAP_3
+	const BIT_PIKACHU_MAP_4
+	const BIT_PIKACHU_MAP_5
+	const BIT_PIKACHU_MAP_6
+	const BIT_PIKACHU_MAP_SCRIPT_ACTIVE
+
+; Pikachu movement commands
+DEF PIKAMOVEMENT_DELAY       EQU $00
+DEF PIKAMOVEMENT_STEP_DOWN   EQU $1d
+DEF PIKAMOVEMENT_STEP_UP     EQU $1e
+DEF PIKAMOVEMENT_STEP_LEFT   EQU $1f
+DEF PIKAMOVEMENT_STEP_RIGHT  EQU $20
+DEF PIKAMOVEMENT_LOOK_DOWN   EQU $35
+DEF PIKAMOVEMENT_LOOK_UP     EQU $36
+DEF PIKAMOVEMENT_LOOK_LEFT   EQU $37
+DEF PIKAMOVEMENT_LOOK_RIGHT  EQU $38
+DEF PIKAMOVEMENT_END         EQU $3f