diff --git a/constants.asm b/constants.asm
index f77f6c4ec..b764c8585 100644
--- a/constants.asm
+++ b/constants.asm
@@ -3484,6 +3484,167 @@ PAR EQU 1 << 6
 
 
 
+; move effects
+EFFECT_NORMAL_HIT          EQU $00
+EFFECT_SLEEP               EQU $01
+EFFECT_POISON_HIT          EQU $02
+EFFECT_LEECH_HIT           EQU $03
+EFFECT_BURN_HIT            EQU $04
+EFFECT_FREEZE_HIT          EQU $05
+EFFECT_PARALYZE_HIT        EQU $06
+EFFECT_EXPLOSION           EQU $07
+EFFECT_DREAM_EATER         EQU $08
+EFFECT_MIRROR_MOVE         EQU $09
+EFFECT_ATTACK_UP           EQU $0a
+EFFECT_DEFENSE_UP          EQU $0b
+EFFECT_SPEED_UP            EQU $0c
+EFFECT_SP_ATTACK_UP        EQU $0d
+EFFECT_SP_DEFENSE_UP       EQU $0e
+EFFECT_ACCURACY_UP         EQU $0f
+EFFECT_EVASION_UP          EQU $10
+EFFECT_ALWAYS_HIT          EQU $11
+EFFECT_ATTACK_DOWN         EQU $12
+EFFECT_DEFENSE_DOWN        EQU $13
+EFFECT_SPEED_DOWN          EQU $14
+EFFECT_SP_ATTACK_DOWN      EQU $15
+EFFECT_SP_DEFENSE_DOWN     EQU $16
+EFFECT_ACCURACY_DOWN       EQU $17
+EFFECT_EVASION_DOWN        EQU $18
+EFFECT_HAZE                EQU $19
+EFFECT_BIDE                EQU $1a
+EFFECT_RAMPAGE             EQU $1b
+EFFECT_WHIRLWIND           EQU $1c
+EFFECT_MULTI_HIT           EQU $1d
+EFFECT_CONVERSION          EQU $1e
+EFFECT_FLINCH_HIT          EQU $1f
+EFFECT_HEAL                EQU $20
+EFFECT_TOXIC               EQU $21
+EFFECT_PAY_DAY             EQU $22
+EFFECT_LIGHT_SCREEN        EQU $23
+EFFECT_TRI_ATTACK          EQU $24
+; unused                   EQU $25
+EFFECT_OHKO                EQU $26
+EFFECT_RAZOR_WIND          EQU $27
+EFFECT_SUPER_FANG          EQU $28
+EFFECT_STATIC_DAMAGE       EQU $29
+EFFECT_BIND                EQU $2a
+; unused                   EQU $2b
+EFFECT_DOUBLE_HIT          EQU $2c
+EFFECT_JUMP_KICK           EQU $2d
+EFFECT_MIST                EQU $2e
+EFFECT_FOCUS_ENERGY        EQU $2f
+EFFECT_RECOIL_HIT          EQU $30
+EFFECT_CONFUSE             EQU $31
+EFFECT_ATTACK_UP_2         EQU $32
+EFFECT_DEFENSE_UP_2        EQU $33
+EFFECT_SPEED_UP_2          EQU $34
+EFFECT_SP_ATTACK_UP_2      EQU $35
+EFFECT_SP_DEFENSE_UP_2     EQU $36
+EFFECT_ACCURACY_UP_2       EQU $37
+EFFECT_EVASION_UP_2        EQU $38
+EFFECT_TRANSFORM           EQU $39
+EFFECT_ATTACK_DOWN_2       EQU $3a
+EFFECT_DEFENSE_DOWN_2      EQU $3b
+EFFECT_SPEED_DOWN_2        EQU $3c
+EFFECT_SP_ATTACK_DOWN_2    EQU $3d
+EFFECT_SP_DEFENSE_DOWN_2   EQU $3e
+EFFECT_ACCURACY_DOWN_2     EQU $3f
+EFFECT_EVASION_DOWN_2      EQU $40
+EFFECT_REFLECT             EQU $41
+EFFECT_POISON              EQU $42
+EFFECT_PARALYZE            EQU $43
+EFFECT_ATTACK_DOWN_HIT     EQU $44
+EFFECT_DEFENSE_DOWN_HIT    EQU $45
+EFFECT_SPEED_DOWN_HIT      EQU $46
+EFFECT_SP_ATTACK_DOWN_HIT  EQU $47
+EFFECT_SP_DEFENSE_DOWN_HIT EQU $48
+EFFECT_ACCURACY_DOWN_HIT   EQU $49
+EFFECT_EVASION_DOWN_HIT    EQU $4a
+EFFECT_SKY_ATTACK          EQU $4b
+EFFECT_CONFUSE_HIT         EQU $4c
+EFFECT_TWINEEDLE           EQU $4d
+; unused                   EQU $4e
+EFFECT_SUBSTITUTE          EQU $4f
+EFFECT_HYPER_BEAM          EQU $50
+EFFECT_RAGE                EQU $51
+EFFECT_MIMIC               EQU $52
+EFFECT_METRONOME           EQU $53
+EFFECT_LEECH_SEED          EQU $54
+EFFECT_SPLASH              EQU $55
+EFFECT_DISABLE             EQU $56
+EFFECT_LEVEL_DAMAGE        EQU $57
+EFFECT_PSYWAVE             EQU $58
+EFFECT_COUNTER             EQU $59
+EFFECT_ENCORE              EQU $5a
+EFFECT_PAIN_SPLIT          EQU $5b
+EFFECT_SNORE               EQU $5c
+EFFECT_CONVERSION2         EQU $5d
+EFFECT_LOCK_ON             EQU $5e
+EFFECT_SKETCH              EQU $5f
+EFFECT_DEFROST_OPPONENT    EQU $60
+EFFECT_SLEEP_TALK          EQU $61
+EFFECT_DESTINY_BOND        EQU $62
+EFFECT_REVERSAL            EQU $63
+EFFECT_SPITE               EQU $64
+EFFECT_FALSE_SWIPE         EQU $65
+EFFECT_HEAL_BELL           EQU $66
+EFFECT_PRIORITY_HIT        EQU $67
+EFFECT_TRIPLE_KICK         EQU $68
+EFFECT_THIEF               EQU $69
+EFFECT_MEAN_LOOK           EQU $6a
+EFFECT_NIGHTMARE           EQU $6b
+EFFECT_FLAME_WHEEL         EQU $6c
+EFFECT_CURSE               EQU $6d
+; unused                   EQU $6e
+EFFECT_PROTECT             EQU $6f
+EFFECT_SPIKES              EQU $70
+EFFECT_FORESIGHT           EQU $71
+EFFECT_PERISH_SONG         EQU $72
+EFFECT_SANDSTORM           EQU $73
+EFFECT_ENDURE              EQU $74
+EFFECT_ROLLOUT             EQU $75
+EFFECT_SWAGGER             EQU $76
+EFFECT_FURY_CUTTER         EQU $77
+EFFECT_ATTRACT             EQU $78
+EFFECT_RETURN              EQU $79
+EFFECT_PRESENT             EQU $7a
+EFFECT_FRUSTRATION         EQU $7b
+EFFECT_SAFEGUARD           EQU $7c
+EFFECT_SACRED_FIRE         EQU $7d
+EFFECT_MAGNITUDE           EQU $7e
+EFFECT_BATON_PASS          EQU $7f
+EFFECT_PURSUIT             EQU $80
+EFFECT_RAPID_SPIN          EQU $81
+; unused                   EQU $82
+; unused                   EQU $83
+EFFECT_MORNING_SUN         EQU $84
+EFFECT_SYNTHESIS           EQU $85
+EFFECT_MOONLIGHT           EQU $86
+EFFECT_HIDDEN_POWER        EQU $87
+EFFECT_RAIN_DANCE          EQU $88
+EFFECT_SUNNY_DAY           EQU $89
+EFFECT_STEEL_WING          EQU $8a
+EFFECT_METAL_CLAW          EQU $8b
+EFFECT_ANCIENTPOWER        EQU $8c
+EFFECT_FAKE_OUT            EQU $8d
+EFFECT_BELLY_DRUM          EQU $8e
+EFFECT_PSYCH_UP            EQU $8f
+EFFECT_MIRROR_COAT         EQU $90
+EFFECT_SKULL_BASH          EQU $91
+EFFECT_TWISTER             EQU $92
+EFFECT_EARTHQUAKE          EQU $93
+EFFECT_FUTURE_SIGHT        EQU $94
+EFFECT_GUST                EQU $95
+EFFECT_STOMP               EQU $96
+EFFECT_SOLARBEAM           EQU $97
+EFFECT_THUNDER             EQU $98
+EFFECT_TELEPORT            EQU $99
+EFFECT_BEAT_UP             EQU $9a
+EFFECT_FLY                 EQU $9b
+EFFECT_DEFENSE_CURL        EQU $9c
+
+
+
 ; battle animations
 ; animations below fc are 1:1 with move constants
 ANIM_CONFUSED EQU $103