River Acheron Stages

River Acheron is a set of special stages that appears on the 11th, 12th, 25th and 26th days of every month. It is unlocked after clearing River Styx. The first stage yields 1 million XP when first completed, while the second stage drops the True Form of Express Cat, Bullet Train Cat.

List of Stages

	English Version	Japanese Version	Translation	Energy Cost
Stage 1	Wrath of Carnage (Deadly)	阿・修羅の道極ムズ (Omone・Shura no Michi Goku Muzu)	A・Shura's Path Extreme	200
Stage 2	Revenge of Carnage (Merciless)	羅刹街道超極ムズ (Rasetsu Kaidō Chō Goku Muzu)	Rakshasa Highway Super Extreme	200

Appears

Japanese Version

The 11th, 12th, 25th and 26th days in any month
First appearance: April 25th, 2019 to April 26th, 2019

English Version

The 11th, 12th, 25th and 26th days in any month
First appearance: May 25th, 2019 to May 26th, 2019

Reference

https://battlecats-db.com/stage/s01199.html

Awakening Stages

Stages
Actress Awakens!	Taking the Stage (Veteran) • Taking the Stage (Insane)
Kung-Fu Awakens!	Path of Kung-Fu (Expert) • Path of Kung-Fu (Insane)
Mr. Awakens!	Mr.-ious Evolution (Expert) • Mr.-ious Evolution (Insane)
Bondage Awakens!	Bound to Evolve (Expert) • Bound to Evolve (Insane)
The Dom Awakens!	Whipped into Shape (Expert) • Whipped into Shape (Insane)
Box Cats Awaken!	Boxing Clever (Expert) • Boxing Clever (Insane)
Panties Awakens!	No Frills Evolution (Expert) • No Frills Evolution (Insane)
Tricycle Awakens!	Hell on 3 Wheels (Expert) • Hell on 3 Wheels (Insane)
Ninja Awakens!	Way of the Ninja (Veteran) • Way of the Ninja (Insane)
Zombie Awakens!	Shambling Along (Expert) • Shambling Along (Insane)
Samurai Awakens!	Way of the Samurai (Veteran) • Way of the Samurai (Insane)
Sumo Awakens!	Oh Yokozuna! (Expert) • Oh Yokozuna! (Insane)
Boogie Awakens!	Boogie Up (Expert) • Boogie Up (Insane)
Skirt Awakens!	Skirting Danger (Veteran) • Skirting Danger (Insane)
Adult Cat Awakes!	Growing Up (Expert) • Growing Up (Insane)
Evil Cat Awakes!	Something Wicked (Expert) • Something Wicked (Insane)
Doll Cat Awake!	Dolled Up (Expert) • Dolled Up (Insane)
Maiden Awakes!	Order Maiden (Expert) • Order Maiden (Insane)
Koi Awakens!	Carp A Diem (Expert) • Carp A Diem (Insane)
Bride Awakens!	Bridal Blues (Expert) • Bridal Blues (Insane)
Vacation Awakes!	End of Holiday (Expert) • End of Holiday (Insane)
Vengeance Awakes!	No Need to Curse! (Expert) • No Need to Curse! (Insane)
Kung-Fu X Awakens!	Old Master (Expert) • Old Master (Insane)
Sports Day Awakens!	Sweat and Tears (Expert) • Sweat and Tears (Insane)
Salaryman Awakes!	Nine to Five Fever (Expert) • Nine to Five Fever (Insane)
Reindeer Fish Awakens!	Reindeer Road (Expert) • Reindeer Road (Insane)
Maniac Stages	Deathhawk (Deadly) • Vulcanizer (Deadly) • Unjust War (Deadly) • Muscle Party (Deadly) • Lots O' Lion (Deadly) • Forest Beasts (Deadly) • Ogre Island (Deadly) • Draconian (Deadly) • Resident Feline (Deadly)
Li'l Stages	Tiny Meows (Deadly) • Tiny Will (Deadly) • Tiny Chopper (Deadly) • Tiny Creeper (Deadly) • Tiny Horns (Deadly) • Tiny Wings (Deadly) • Tiny Fins (Deadly) • Tiny Tail (Deadly) • Tiny Fists (Deadly)
Crimson Vengeance	Wrath of R-Cyclone (Insane) • Revenge of R-Cyclone (Deadly)
NEO Darkness Heaven	Wrath of B-Cyclone (Insane) • Revenge of B-Cyclone (Deadly)
Peerless Too	Wrath of W-Cyclone (Insane) • Revenge of W-Cyclone (Deadly)
Wrath of the Divine	Wrath of A-Cyclone (Insane) • Revenge of A-Cyclone (Deadly)
Bitter Irony	Wrath of Titanium (Deadly) • Revenge of Titanium (Deadly)
Dimension of Delirium	Wrath of Black Hole (Deadly) • Revenge of Black Hole (Deadly)
Red Sky at Night	Wrath of Red Sky (Deadly) • Revenge of Red Sky (Merciless)
The Dead Keep Rolling	Wrath of the Unholy (Deadly) • Revenge of the Unholy (Merciless)
The 3rd Dimension	Revenge of the Wormhole (Merciless) • Wrath of the Wormhole (Merciless)
Typhoon Nihil	Creation's Gyre (Merciless) • Extinction's Vortex (Merciless)
Clionel Dominant	New Testament (Deadly) • A Cat Screaming Love (Merciless)
River Acheron	Wrath of Carnage (Deadly) • Revenge of Carnage (Merciless)
Queen's Condemnation	Honey Drip (Deadly) • Royal Jelly Hell (Merciless)
Dead by Encore	Prisoner's Progress (Merciless) • March to Death (Merciless)
King Wahwah's Return	Revenge of N-1 (Merciless) • Wrath of the Dogelord (Merciless)
A Deeper Dream	Wrath of the Dreamer (Deadly) • Revenge of the Dreamer (Merciless)
Top of the Bog	Guided by Currents (Merciless) • Water Conservancy (Merciless)
Courts of Agony	Heaven and Hell (Merciless) • Okame's Teahouse (Merciless)
Droid Awakes!	ParaDroid (Expert) • ParaDroid (Insane)
Kerihime Awakens!	Road to Kerihime Evolution (Expert) • Road to Kerihime Evolution (Insane)
Sleeping Beauty Awakens!	Road to Sleeping Beauty Evolution (Expert) • Road to Sleeping Beauty Evolution (Insane)
Healer Awakens!	Healer Awakens (Expert) • Healer Awakens (Insane)
Merc Awakens!	Merc Awakens (Veteran) • Merc Awakens (Insane)
Titi Awakens!	Titi Awakens (Veteran) • Titi Awakens (Insane)
Cabaret Cat Awakens!	Crescendo (Veteran) • Crescendo (Insane)
Takuya & Yuki Awaken	Takuya & Yuki Awaken! (Veteran) • Takuya & Yuki Awaken! (Insane)
Castle and Dragon Awakens!	Road to Swordsman Evolution (Easy) • Road to Horsemen Cavalry Evolution (Easy) • Road to Ashura Evolution (Easy) • Road to Battle Balloon Evolution (Normal) • Road to Dragon Rider Evolution (Normal) • Road to Pretty Cat Evolution (Normal) • Road to Cyclops Evolution (Hard) • Road to Golem Evolution (Hard)
Walpurgisnacht	Stagebuilding Witch: Cycle 1~10
Nutcracker Witch	This is My Despair • How Did it Come to This? • Thank You For Coming • Just Couldn't Say Goodbye • I'm Sorry
Gudetama Cat Awakens!	Road to Gudetama Cat Evolution (Veteran) • Road to Gudetama Cat Evolution (Insane)
Holy War: Saber Alter	Consumed by Shadow (Veteran) • Consumed by Shadow (Deadly)
Prof. Wild's Challenge	Willing Sacrifice (Veteran) • Willing Sacrifice (Deadly)
The 10th Angel Strikes!	Refusal Type (Hard) • Refusal Type (Merciless)
Unit-13 Strikes!	It's Not Your Fault (Veteran) • We'll Meet Again (Merciless)
Devilish Illusion	A Tower Piercing the Sky (Hard) • A Tower Piercing the Sky (Insane)
Yamato Awakens!	Inherited Ambition (Veteran) • Inherited Ambition (Deadly)
Hikakin Awakens!	Phoenix Dance (Easy)
Kaohsiung Rapid Transit Orange Line	Sizihwan • Yanchengpu • Beautiful Island • Weiwuying • Dadong
Nekondo Awakens!	Road to Nekondo Evolution (Normal)
Flower Cat Awakens!	Bloomin' Brightly (Easy)
Cat Kart Awakens!	Kartopia (Expert) • Kartopia (Insane)
Catburger Awakens!	Value Ordeal (Normal)
Infernal Tower	Floor 30

Enemies

Beefcake Cat • Dancer Cat • Hyper Mr. • Ultimate Bondage Cat • Dark Lazer • Heavy Assault C.A.T. • Lollycat • Unicycle Cat • Flying Ninja Cat • Skelecat • Pastry Cat • Riceball Cat • Gato Amigo • Loincloth Cat • Prisoner Cat • Gentleman Bros. • Nyalladin • Wrestling Cat • Madam the Savannah • Kiss and Koi • Call Center Cat • Kite Cat • Iron Claw • Rampage Cats • Ritual Cat • Xmas Pudding Cat • Manic Mohawk Cat • Manic Eraser Cat • Manic Dark Cat • Manic Macho Legs Cat • Manic Lion Cat • Manic Flying Cat • Manic Island Cat • Manic King Dragon Cat • Manic Jamiera Cat • Li'l Mohawk Cat • Li'l Eraser Cat • Li'l Dark Cat • Li'l Macho Legs Cat • Li'l Lion Cat • Li'l Flying Cat • Li'l Island Cat • Li'l King Dragon Cat • Li'l Jamiera Cat • Sakura Android • Wedding Kerihime • Eternal Sleeping Beauty • Mega Cat EX • Healer Cat CC • Merc & Cat CC • Titi Cat CC • Takuya and Lovely Yuki • Gudebene Cat • Mukyakin • Nekondo SP • Cat Kart P • Value Meal Cat • Masked Grandmaster Cat