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Gravios

A large wyvern found in volcanic zones. They possess a fiery breath attack and the ability to emit a sleeping gas. They also have extremely hard scales that deflect most weapon attacks.

A Flying Wyvern that lives in the Volcano and the Swamp. It is known for its rock-like shell and is called the “Armored Wyvern.” It breathes a powerful, searing breath and sprays sleep gas from its body. Its hard outer shell lets it dive even into lava for short periods.
Our translation of モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 246.

Guide book figures for Gravios

Health

Quests	Health	Capture	Limping
Easy, Village Low Rank	2,400	40%	30%
Gathering Hall Low Rank	4,600	40%	30%
Village High Rank	4,000 (2,200)	24%	18%
Gathering Hall High Rank	5,600 (2,200)	24%	18%
G-Level	7,600 (3,400)	20%	15%

Capture and Limping are the share of health left when it can be captured and when it starts to limp away. The figure in brackets is its health in quests with two or more of it.

Size

Small	Big	King
2036.9	2582.9	2834.9

Small is the most a gold small crown can be. Big and King are the least for a silver and a gold crown.

Status ailments

	Effect	Tolerance	Buildup loss	Rise	Max
Poison	240 damage	150	10 every 5 s	75	450 (600)
Paralysis	15 s	200	5 every 10 s	75	500 (650)
Sleep	60 s	200	5 every 10 s	50	400 (500)
Stun	15 s	200	5 every 10 s	75	500 (650)

Tolerance is the buildup needed for the ailment. It goes up by the Rise figure each time, up to Max; Max in brackets is for G-Level. Poison effect is the total damage, the others are how long it lasts.

When enraged

Attack	Defense	Speed
+50%	+20%	+10%

Attack is the extra damage it deals to hunters. Defense above zero means it takes less damage.

Hitzones

Part	Cut	Impact	Shot	Water	Thunder	Ice	Dragon	Stun
Head	20	30	20	15	5	5	40	150
Underneck	30	30	20	30	5	10	20	0
Belly	25	30	30	35	5	15	35	0
Back	20	30	20	25	5	10	15	0
Wings	20	20	20	20	5	5	15	0
Legs	15	25	20	30	5	5	10	0
Tail underside	25	30	20	30	5	10	20	0

After the belly break

Part	Cut	Impact	Shot	Fire	Water	Thunder	Ice	Dragon	Stun
Head	20	30	20	0	15	5	5	40	150
Underneck	30	30	20	0	30	5	10	20	0
Belly	80	80	75	15	50	5	15	50	0
Back	20	30	20	0	25	5	10	15	0
Wings	20	20	20	0	20	5	5	15	0
Legs	15	25	20	0	30	5	5	10	0
Tail underside	25	30	20	0	30	5	10	20	0

Higher numbers take more damage. Stun is how much impact hits on that part add toward a stun.

Part durability

Head, Neck	120
Body	240
Belly	700
Left wing	120
Right wing	120
Left leg	160
Right leg	160
Tail	200

Breaks and tail cuts

Chest	Bring the belly's durability to 0 once.
Belly	Bringing the belly's durability to 0 twice breaks the belly. Only then is the reward given.
Tail	Bring the tail's durability to 0 once. Can only be severed with cutting attacks.

Carves and rewards

Carves: Body 4, Tail 2.

Low Rank

Item	Body	Tail	Capture	Break	Drop
Flame Sac	12%	-	-	-	-
Flame Sac ×2	-	-	41%	-	-
Firestone	-	4%	6%	-	6%
Sleep Sac	20%	-	21%	-	-
Sleep Sac ×2	-	-	-	10% (Belly)	-
Gravios Shell	63%	73%	32%	90% (Belly)	-
Gravios Skl Shl	5%	-	-	-	-
Lg Monster Bone	-	23%	-	-	-
Wyvern Tears	-	-	-	-	94%

High Rank

Item	Body	Tail	Capture	Break	Drop
Firestone	-	-	8%	-	-
Hrd Monster Bone	-	20%	-	-	-
Firecell Stone	-	2%	6%	-	6%
Sleep Sac	10%	-	20%	-	-
Sleep Sac ×2	-	-	-	10% (Belly)	-
Inferno Sac	10%	-	34%	-	-
Gravios BrainStm	-	12%	-	-	-
Gravios Carapace	50%	66%	32%	57% (Belly)	-
Gravios Shell	18%	-	-	33% (Belly)	-
Gravios Skl Shl	5%	-	-	-	-
Wyvern Stone	7%	-	-	-	-
Wyvern Tears	-	-	-	-	47%
Wyvern Sobs	-	-	-	-	47%

G-Level

Item	Body	Tail	Capture	Break	Drop
Blazing Fire Sac	10%	-	16%	-	-
Firecell Stone	-	2%	14%	-	10%
Coma Sac	17%	-	30%	-	-
Coma Sac ×2	-	-	-	15% (Belly)	-
Hvy Monster Bone	-	20%	-	-	-
Big Wyvern Stone	7%	-	-	-	-
Gravios BrainStm	-	12%	-	-	-
Gravios Carapace	10%	-	-	18% (Belly)	-
HvyGraviosShell	50%	66%	40%	57% (Belly)	-
HvnlyGraviosShl	6%	-	-	10% (Belly)	-
Wyvern Tears	-	-	-	-	30%
Wyvern Sobs	-	-	-	-	60%

Figures from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), pages 246 and 247.

Quests it appears in

Valor in the Swamp ZoneGathering Hall, Low Rank Terror of the GraviosGathering Hall, High Rank Hotter than Hell ItselfGathering Hall, High Rank Armored SupremacyGathering Hall, G-Level Fire, Electricity, Heat RayGathering Hall, G-Level Treasure in the Lava!Treasure Hunters Terror of the GraviosPokke Village Armored SupremacyPokke Village Hard-Shelled TerrorsPokke Village Gravios TrainingTraining School

Black Gravios

A subspecies of Gravios called the “Black Armored Wyvern” for its shell, which has turned jet black. Its hide is even harder than an ordinary one's, and it is said that a half-hearted weapon cannot leave a single scratch on it. An impregnable black wyvern.
Our translation of モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 248.

Terror of the GraviosGathering Hall, Low Rank Black Rock in the SwampGathering Hall, High Rank Terror of the GraviosGathering Hall, G-Level The Dark CataphractsGathering Hall, G-Level Pride on the LineGathering Hall, G-Level Black Rock in the SwampPokke Village Two Black Suits of ArmorPokke Village

Guide book figures for Black Gravios