Defeat the 7-Star Unrivaled Decidueye in the fastest way possible solo or with friends by using the best counter strategies! Read on to learn the best solo and team strategies against the 7-Star Decidueye!

7-Star Decidueye Solo and OHKO Strategies

Event Decidueye Typing, Moves and General Information

7☆ Decidueye ・Level: 100 ・Tera Type: ・Ability: Long Reach ・Nature: Bold ・6 IV's in every stat			Raid Behaviour and Timings
			Turn 2	Removes Your Buffs Feather Dance
			Turn 4	Removes Stat Drops Tera Energy Shield Swords Dance
			50% HP	Air Cutter x2 Increased chance to Attack twice per turn
Stats
HP	78
Atk	107
Def	75
SpAtk	100
SpDef	100
Speed	70
Total	530
Moveset
Regular Moves			Extra Moves
・ Brave Bird ・ Low Kick ・ Spirit Shackle ・ Leaf Blade			・ Air Cutter ・ Feather Dance ・ Swords Dance

The special Unrivaled Decidueye Event is a 7-Star Tera Raid against Decidueye with a Flying Tera Type. In the second round of this event, 7-Star Raids are available from March 24th, 00:00 UTC until March 26th, 23:59 UTC.

The Unrivaled Decidueye runs a mostly Physical attacking set, dealing devastating damage with a tera-boosted Brave Bird and amazing coverage in its movepool like Spirit Shackle and Low Kick. Be careful also as once it puts up its shield it has a high chance of hitting your pokemon with two moves consecutively.

For this raid, it is smart to bring a special attacking Electric-type like Miraidon or Bellibolt. These Pokemon resists a good amount of Decidueye's moves while also dealing super-effective damage in return.
7-Star Decidueye Tera Raid Event

Best Solo Strategies for Decidueye Tera Raid

Best Decidueye Tera Raid Counters
Miraidon	Bellibolt	Iron Hands

How to Solo and OHKO 6 and 7-Star Tera Raids

Miraidon

Miraidon	Tera Type			Nature
				Modest (↑SpA, ↓Atk)
	EV Spread
	HP: 252		Sp. Atk: 252		Def: 4
Ability	Moveset
Hadron Engine	・ Parabolic Charge ・ Metal Sound ・ Electro Drift ・ Charge
Held Item
Life Orb

Summary

Miraidon's unique typing allows it to resist Decidueye's STAB Grass and Flying-type moves. Paired with its amazing stats, it should be able to go up against Decidueye with relative ease.

Offensively, Miraidon can use Electro Drift and Parabolic Charge to deal Super Effective damage against Decidueye. Both moves benefit from STAB and Electric Terrain, making Miraidon a deadly attacker for this raid. Metal Sound and Charge both drastically improve Miraidon's damage output, so take time to set up these moves as well.

As it will play the role of special attacker, a Modest Nature would benefit Miraidon. You can also let it hold Life Orb to deal 30% increased damage with Electro Drift.

Tera Raid Strategy

Miraidon Tera Raid Turn-by-Turn Counter Strategy
Turns 1~2	Use Metal Sound to lower Decidueye's Sp. Def stat.
Turn 3	Use Charge to double Electro Drift's base power.
Turn 4	Use Electro Drift to deal Super Effective damage, and finish the Raid.

Start the battle by using Metal Sound to lower Decidueye's Sp. Def by 4 stages.

By using Charge, Electro Drift's Base Power is then increased to 200, and with Decidueye's lowered Sp. Def stat, using Electro Drift should result in a OHKO.

Since Decidueye puts up its Energy Shield, and removes debuffs at around Turn 4, or around 80% HP, speed is key, and doing the raid with AI teammates instead may yield better results.

Key Damage Calculations

Damage Dealt by Miraidon
(-4 Sp. Def) 8910 HP (Max HP x30)	Electro Drift (200 BP, Electric Terrain, Life Orb) 6,691 ~ 7,872 (75.10 ~ 88.35%)

Note: Results in OHKO thanks to damage of AI Pokemon during your initial setup

4 Turns to Beat

Following our build and the strategy above, it should take you around 4 turns to defeat the raid Pokemon. It will take 3 turns to complete your setup, and one additional turn to defeat the raid Pokemon.

Note that this is an approximate value only, and other factors, such as the raid Pokemon removing buffs or debuffs, may affect the actual outcome.

Best Miraidon Build for Decidueye Tera Raid

Bellibolt

Bellibolt	Tera Type			Nature
				Quiet (↑Sp.Atk, ↓Spe)
	EV Spread
	HP: 128		Sp.Atk: 252		Def 128
Ability	Moveset
Electromorphosis	・ Parabolic Charge ・ Electric Terrain ・ Reflect ・ Acid Spray
Held Item
Magnet

Summary

Bellibolt is able to counter Decidueye effectively thanks to its natural bulk, on top of its Electromorphosis, which doubles the damage of its Electric-type moves after being hit.

Offensively, Bellibolt can deal massive super-effective damage with Parabolic Charge after lowering its Special Defense with Acid Spray.

Giving it a Quiet Nature will ensure that Bellibolt attacks before Decidueye. You can also give it a Magnet to boost the power of Parabolic Charge.

This build can take on the raid alone if the set up is done correctly.

Tera Raid Strategy

Bellibolt Tera Raid Turn-by-Turn Counter Strategy
Turn 1	Use Reflect to boost your team's defense against Physical Attacks.
Turns 2~3	Use Acid Spray to lower Decidueye's Sp. Def stat.
Turn 4	Use Parabolic Charge to deal super-effective damage, and recover HP.
Turns 5~6	After Decidueye removes debuffs, use Acid Spray to lower its Sp. Def again.
Turn 7	Use Electric Terrain to boost the power of Electric-type moves.
Turns 8+	Terastallize and repeatedly use Parabolic Charge to finish the raid.

Start the battle by using Reflect, since Decidueye is mainly a Physical Attacker. From there, use Acid Spray twice to reduce Decidueye's Sp. Def stat by 4 stages, allowing you to deal decent damage with Parabolic Charge before it puts up its energy shield.

After Decidueye puts up its Energy Shield, use Acid Spray twice again to lower its Sp. Def stat by 4 stages again. After that, use Electric Terrain to boost Parabolic Charge's damage for the next 5 turns.

Once you complete your setup, Terastallize and repeatedly use Parabolic Charge until you defeat Decidueye.

Key Damage Calculations

Damage Dealt by Bellibolt
(-6 Sp. Def) 8910 HP (Max HP x30)			Parabolic Charge (130 BP, Magnet, Electric Tera) 2,536 ~ 2,984 (28.46 ~ 33.49%)
(-6 Sp. Def, with Energy Shield) 8910 HP (Max HP x30)			Parabolic Charge (130 BP, Magnet, Electric Tera) 1,776 ~ 2,089 (19.93 ~ 23.45%)
Damage Received by Bellibolt
Move		No Boosts		+2 Atk
Leaf Blade		121 ~ 144 (28.6 ~ 34.1%) Possible 3-Hit KO		243 ~ 286 (57.5 ~ 67.7%) Possible 2-Hit KO
Low Kick		90 ~ 107 (21.3 ~ 25.3%) Possible 4-Hit KO		180 ~ 212 (42.6 ~ 50.2%) Possible 3-Hit KO
Air Cutter		38 ~ 45 (9 ~ 10.6%) Possible 10-Hit KO		-
Spirit Shackle		109 ~ 129 (25.8 ~ 30.5%) Possible 4-Hit KO		216 ~ 255 (55.1 ~ 60.4%) Possible 2-Hit KO

9~11 Turns to Beat

Following our build and the strategy above, it should take you around 9~11 turns to defeat the raid Pokemon. It will take around 7 turns to complete your setup, and a few more turns of dealing damage to defeat the raid Pokemon.

Note that this is an approximate value only, and other factors, such as the raid Pokemon removing buffs or debuffs earlier, may affect the actual outcome.

Best Bellibolt Build for Decidueye Tera Raid

Iron Hands

Iron Hands	Tera Type			Nature
				Adamant (↑Atk, ↓SpA)
	EV Spread
	HP: 252		Atk: 252		Def: 4
Ability	Moveset
Quark Drive	・ Swords Dance ・ Thunder Punch ・ Rock Tomb ・ Electric Terrain
Held Item
Shell Bell

Summary

Iron Hands is able to take Decidueye head on thanks to its typing which allows it to receive neutral damage from Grass, Flying and Ghost-type moves. Iron Hands also has decent defensive stats, allowing it to safely set up Swords Dance against Decidueye. Swords Dance is used over Belly Drum, as Decidueye is able to deal neutral damage against Iron Hands with Brave Bird, Low Kick, Spirit Shackle, and Air Cutter.

Offensively, Iron Hands can deal respectable Super Effective damage with Thunder Punch. Electric Terrain allows Iron Hands to boost the damage of Thunder Punch further, while also activating Quark Drive for an additional Attack boost.

As it will play the role of physical attacker, an Adamant Nature would benefit Iron Hands. You can also let it hold a Shell Bell to recover some HP after dealing damage.

Tera Raid Strategy

Iron Hands Tera Raid Turn-by-Turn Counter Strategy
Turn 1	Use Thunder Punch to deal Super Effective damage.
Optional	Use Electric Terrain to boost Wild Charge's damage output.
Turns 2	Use Swords Dance to raise Iron Hands' Attack stat. Be sure to do this after Decidueye resets your side's stats.
Turn 3+	Use Thunder Punch to deal Super Effective damage.

Start the battle by using Thunder Punch to immediately deal damage to Decidueye. You can also opt to deal damage using Rock Tomb early on, to reduce Decidueye's speed, allowing you to Attack before it.

Ideally, having a teammate set up Electric Terrain would be best so you can focus on dealing damage with Thunder Punch, but when playing solo, you can set it up yourself to boost your damage output.

Since this build makes use of Swords Dance and Thunder Punch, the drawback is that you will not be hitting as hard as you would if you were running Belly Drum.

Key Damage Calculations

Damage Dealt by Iron Hands
8910 HP (Max HP x30)			Thunder Punch (+2 Atk, Electric Terrain) 1,224 ~ 1,440 (13.74 ~ 16.16%)
(with Energy Shield) 8910 HP (Max HP x30)			Thunder Punch (+2 Atk, Electric Terrain, Electric Tera) 1,142 ~ 1,344 (12.82 ~ 15.08%)
Damage Received by Iron Hands
Move		No Boosts		+2 Atk
Leaf Blade		106 ~ 126 (20.7 ~ 24.6%) Possible 5-Hit KO		211 ~ 249 (41.2 ~ 48.6%) Possible 3-Hit KO
Low Kick		94 ~ 111 (18.3 ~ 21.6%) Possible 5-Hit KO		187 ~ 221 (36.5 ~ 43.1%) Possible 3-Hit KO
Air Cutter		90 ~ 106 (17.5 ~ 20.7%) Possible 5-Hit KO		-
Spirit Shackle		94 ~ 112 (18.3 ~ 21.8%) Possible 5-Hit KO		187 ~ 222 (36.5 ~ 43.3%) Possible 3-Hit KO

Best Iron Hands Build for Decidueye Tera Raid

Best Team Strategies for Decidueye Tera Raid

6-Star Tera Raid Boss Team Strategy Guides

Miraidon and Magnezone One-Shot Strategy

This one-shot strategy requires a dedicated team with a Support Magnezone to lower Decidueye's Sp. Def with Metal Sound, and boost Miraidon's damage with Helping Hand.

Miraidon OHKO Counter Strategy for 7-Star Decidueye
Turns	Support Magnezone Electric Seed	Charge Miraidon Life Orb
#1	Metal Sound	Metal Sound
#2	Metal Sound	Charge
#3	Helping Hand	Electro Drift

How to One Shot Decidueye

Turn 1

Assuming that the Decidueye will not use any form of debilitating status move on its free turn, the general idea is to lower its Sp. Def stat by 6 stages, and one shot it on the third turn.

The Magnezone should start by using Metal Sound to start lowering Decidueye's Sp. Def stat.

Miraidon should use Charge to double Electro Drift's base power in preparation for turn 2.

Turn 2

For the second turn, Magnezone should keep using Metal Sound to reach -4 Sp. Def on Decidueye.

Miraidon should then use Electro Drift which should result in a One-Hit KO.

By turn 3, Magnezone should now use Helping Hand to further increase the damage of Electro Drift.

Key Damage Calculations

Damage Dealt by Miraidon
(-4 Sp. Def) 8910 HP (Max HP x30)	Electro Drift (200 BP, Electric Terrain, Life Orb) 6,691 ~ 7,872 (75.10 ~ 88.35%)

Note: Results in OHKO thanks to damage of AI Pokemon during your initial setup

2 Turns to Beat

Following our build and the strategy above, it should take you around 2 turns to defeat the raid Pokemon. With just 2 players and a simple setup, It will be a guaranteed KO by round two.

Miraidon One-Shot Team Strategy

This strategy makes use of Florges' Symbiosis, and Chi-Yu's Beads of Ruins ability to empower Miraidon as much as possible, and defeat Decidueye in one hit

This a slightly modified one-shot set up from Reddit user Shiromi55.

Crabominable Counter Strategy for 7-Star Decidueye
Turns	Fake Tears Support	Symbiosis Support Choice Specs	Beads of Ruin Support	Special Carry Weakness Policy
#1	Fake Tears	Fairy Wind	Go All Out! Cheer	Electro Drift

How to One-Shot Decidueye

At the start of the raid, Umbreon should use Fake Tears to lower Decidueye's Sp. Def stat by two stages.

Florges should use Fairy Wind to deal minimal Fairy-type damage to all Pokemon on the field, activating Miraidon's Weakness Policy, and Florges Symbiosis, passing the Choice Specs onto Miraidon.

Chi-Yu should then use the Go All Out! Cheer to maximize the team's damage.

With all the stat boosts prepared, Miraidon should use Electro Drift to wipe out Decidueye in just one turn.

Key Damage Calculations

Damage Dealt by Miraidon
(-2 Sp. Def) 8910 HP (Max HP x30)	Electro Drift (+2 Sp. Atk, Choice Specs) 8,526 ~ 10,032 (95.69 ~ 112.59%) 75% Chance to OHKO

Anger Point Crabominable One-Shot Strategy

This strategy makes use of Crabominable's Anger Point ability to immediately get +6 Attack, and defeat Decidueye in one hit.

This a slightly modified one-shot set up conceptualized by SkiddyJ (@SkiddyJ_all_day).

Crabominable Counter Strategy for 7-Star Decidueye
Turns	Screech Support	Screech Support	Crit Support	Physical Carry
#1	Screech	Screech	Frost Breath (on Crabominable)	Ice Hammer

How to One-Shot Decidueye

At the start of the raid, both Corviknight should use Screech to lower Decidueye's Defense by 4 stages.

Glalie should then use Frost Breath on Crabominable, to activate its Anger Point.

With all the stat boosts prepared, Crabominable should use Ice Hammer to wipe out Decidueye in just one turn.

Key Damage Calculations

Damage Dealt by Crabominable
(-4 Def) 8910 HP (Max HP x30)	Ice Hammer (+6 Atk, Choice Band) 8,274 ~ 9,737 (92.86 ~ 109.28%) 56.25% Chance to OHKO

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7☆ Hisuian Samurott	7☆ Eevee	7☆ Hisuian Typhlosion	7☆ Hisuian Decidueye
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