Decidueye (Hisui) in Emerald Imperium

Grass / Fighting — where to catch it, what it learns, and how it differs from the official games.

Compared with the official games

Against the base species it is built from:

Stats HP 78 → 98, Attack 107 → 112, Defense 75 → 85, Sp. Atk 100 → 75 (total 530 → 540)
Type Grass / Ghost → Grass / Fighting
Abilities gains Striker, Quill Rush and loses Long Reach

Compared against present-day official data. The Fairy type and hidden abilities arrived after Pokémon Emerald, so a difference here can belong to the series rather than to this hack.

Decidueye (Hisui) in other guides

The same Pokémon, as 2 other hacks change it:

Emerald Rogue Radical Red

Where to find Decidueye (Hisui)

Not found in the wild — evolve or trade for it.

Level-up moves

Lv	Move	Type	Cat	Pow	Acc	PP
1	False Swipe	Normal	Phys	40	100	40
1	Leaf Storm Whips up a storm of leaves. Harshly lowers the Sp. Atk.	Grass	Spec	130	100	5
1	Leafage Attacks with a flurry of small leaves.	Grass	Phys	40	100	40
1	Rock Smash A rock-crushing attack that may lower Defense.	Fighting	Phys	60	100	15
1	Sucker Punch	Dark	Phys	70	100	5
1	Tackle Charges the foe with a full- body tackle.	Normal	Phys	40	100	35
1	Triple Arrows On evolution High critical hit ratio. May lower Defense or flinch.	Fighting	Phys	90	100	15
1	Triple Arrows High critical hit ratio. May lower Defense or flinch.	Fighting	Phys	90	100	15
1	Trop Kick An intense kick from the tropics. Lowers Attack.	Grass	Phys	70	100	15
1	U-turn	Bug	Phys	70	100	20
4	Growl Growls cutely to reduce the foe's Attack.	Normal	Stat	—	100	40
8	Pluck	Flying	Phys	60	100	20
11	Low Sweep Attacks the foe's legs lowering its Speed.	Fighting	Phys	60	100	20
14	Razor Leaf Cuts the enemy with leaves. High critical-hit ratio.	Grass	Phys	55	100	25
16	Brick Break Destroys barriers such as REFLECT and causes damage.	Fighting	Phys	75	100	15
19	Foresight Negates the foe's efforts to heighten evasiveness.	Normal	Stat	—	—	40
24	Pluck	Flying	Phys	60	100	20
28	Synthesis Restores HP. The amount varies with the weather.	Grass	Stat	—	—	5
33	Aura Sphere Attacks with an aura blast that cannot be evaded.	Fighting	Spec	80	—	20
38	Sucker Punch	Dark	Phys	70	100	5
41	Leaf Blade Slashes with a sharp leaf. High critical-hit ratio.	Grass	Phys	90	100	15
44	Feather Dance Envelops the foe with down to sharply reduce Attack.	Flying	Stat	—	100	5
47	High Jump Kick A jumping knee kick. If it misses, the user is hurt.	Fighting	Phys	130	90	10
50	Leaf Storm Whips up a storm of leaves. Harshly lowers the Sp. Atk.	Grass	Spec	130	100	5
53	Brave Bird A low altitude charge that also hurts the user.	Flying	Phys	120	100	15
56	Swords Dance A fighting dance that sharply raises Attack.	Normal	Stat	—	—	20
60	Thousand Arrows Can hit Flying foes, then knocks them to the ground.	Ground	Phys	90	100	10

* a legal move, just moved to level-up · ** new to this hack

TMs & HMs (39)

#	Move · where to get it	Type	Pow
TM01	Focus Punch	Fighting	150
TM09	Bullet Seed	Grass	25
TM19	Giga Drain	Grass	75
TM22	Solar Beam	Grass	120
TM31	Brick Break	Fighting	75
TM39	Rock Tomb	Rock	60
TM40	Aerial Ace	Flying	60
TM43	Defog	Flying	—
TM46	Thief	Dark	60
TM51	Roost	Flying	—
TM53	Energy Ball	Grass	90
TM54	Grassy Glide	Grass	60
TM56	Power-Up Punch	Fighting	40
TM60	Drain Punch	Fighting	75
TM65	Shadow Claw	Ghost	80
TM70	Triple Axel	Ice	20
TM71	Stone Edge	Rock	100
TM75	Swords Dance	Normal	—
TM78	Low Sweep	Fighting	60
TM80	Rock Slide	Rock	75
TM86	Grass Knot	Grass	1
TM87	Low Kick	Fighting	1
TM88	Pluck	Flying	60
TM89	U-turn	Bug	70
TM94	Trailblaze	Grass	50
TM100	Dual Wingbeat	Flying	40
TM101	Superpower	Fighting	120
TM107	Brave Bird	Flying	120
TM113	Thunder Punch	Electric	75
TM127	Air Slash	Flying	75
TM130	Seed Bomb	Grass	80
TM131	Leaf Blade	Grass	90
TM132	Knock Off	Dark	65
TM143	Aura Sphere	Fighting	80
TM145	Hurricane	Flying	110
TM156	Close Combat	Fighting	120
TM169	Spikes	Ground	—
HM04	Strength	Normal	80
HM06	Rock Smash	Fighting	60