Isekai Academy

Isekai Academy (Japanese: 伊勢海学院 Hepburn: Isekai Gakuin) is a Japanese anime series that serves as a chibi-style crossover between the various isekai genre series. Is the sequel to Isekai Quartet.

Franchises

 * KonoSuba
 * Overlord
 * Re:Zero − Starting Life in Another World
 * The Saga of Tanya the Evil
 * That Time I Got Reincarnated as a Slime
 * The Rising of the Shield Hero
 * No Game No Life
 * Gate
 * Log Horizon
 * Sword Art Online
 * Drifters
 * In Another World with My Smartphone
 * The Twelve Kingdoms
 * How Not to Summon a Demon Lord
 * Wise Man's Grandchild
 * Death March to the Parallel World Rhapsody
 * Grimgar of Fantasy and Ash
 * Arifureta: From Commonplace to World's Strongest
 * Isekai Cheat Magician
 * Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?
 * Demon Lord, Retry!
 * The Devil Is a Part-Timer!
 * Knight's & Magic
 * Restaurant to Another World
 * So I'm a Spider, So What?
 * The Hero is Overpowered but Overly Cautious
 * I've Been Killing Slimes for 300 Years and Maxed Out My Level
 * Problem Children are Coming from Another World, aren't they?
 * Reborn as a Vending Machine, I Now Wander the Dungeon
 * Reincarnated as a Sword

Class-1

 * Roswall L. Mathers (Homeroom Teacher) (Re:Zero − Starting Life in Another World) 
 * Emilia (Class Rep) (Re:Zero − Starting Life in Another World) 
 * Ainz Ooal Gown (Vice Rep) (Overlord)
 * Albedo (second Vice Rep) (Overlord)
 * Kazuma Sato (KonoSuba)
 * Aqua (KonoSuba)
 * Megumin (KonoSuba)
 * Darkness (KonoSuba)
 * Shalltear Bloodfallen (Overlord)
 * Demiurge (Overlord)
 * Aura Bella Fiora (Overlord)
 * Mare Bello Fiore (Overlord)
 * Cocytus (Overlord)
 * Subaru Natsuki (Re:Zero − Starting Life in Another World) 
 * Puck (Re:Zero − Starting Life in Another World) 
 * Rem (Re:Zero − Starting Life in Another World) 
 * Ram (Re:Zero − Starting Life in Another World) 
 * Beatrice (Re:Zero − Starting Life in Another World) 
 * Tanya von Degurechaff (The Saga of Tanya the Evil)
 * Viktoriya Ivanovna Serebryakov (The Saga of Tanya the Evil)
 * Matheus Johann Weiss (The Saga of Tanya the Evil)
 * Vooren Grantz (The Saga of Tanya the Evil)
 * Wilibald Koenig (The Saga of Tanya the Evil)
 * Rhiner Neumann (The Saga of Tanya the Evil)
 * Naofumi Iwatani (The Rising of the Shield Hero)
 * Paphtalia (The Rising of the Shield Hero)
 * Filo (The Rising of the Shield Hero)

Class-2

 * Vanir (Homeroom Teacher) (KonoSuba)
 * Reinhard van Astrea (Class Rep) (Re:Zero − Starting Life in Another World) 
 * Yuri Alpha (Vice Rep) (Overlord)
 * Lupusregina Beta (Overlord)
 * Narberal Gamma (Overlord)
 * Solution Epsilon (Overlord)
 * CZ2128 Delta (Overlord)
 * Entoma Vasilissa Zeta (Overlord)
 * Neia Baraja (Overlord)
 * Chris (KonoSuba)
 * Kyoya Mitsurugi (KonoSuba)
 * Dust (KonoSuba)
 * Felt (Re:Zero − Starting Life in Another World) 
 * Anastasia Hoshin (Re:Zero − Starting Life in Another World)
 * Crusch Karsten (Re:Zero − Starting Life in Another World)
 * Priscilla Barielle (Re:Zero − Starting Life in Another World)
 * Julius Euclius (Re:Zero − Starting Life in Another World) 
 * Felix Argyle (Re:Zero − Starting Life in Another World) 
 * Aldebaran (Re:Zero − Starting Life in Another World)
 * Motoyasu Kitamura (The Rising of the Shield Hero)
 * Ren Amaki (The Rising of the Shield Hero)
 * Itsuki Kawasumi (The Rising of the Shield Hero)
 * Melty Q. Melromarc (The Rising of the Shield Hero)

Class-3

 * Sebas Tian (Homeroom Teacher) (Overlord)
 * Yunyun (possible Class Rep) (KonoSuba)
 * Tuareninya Veyron (Overlord)
 * Brain Unglaus (Overlord)
 * Climb (Overlord)
 * Frederica Baumann (Re:Zero − Starting Life in Another World)
 * Malty S. Melromarc (The Rising of the Shield Hero)
 * Milim (That Time I Got Reincarnated as a Slime)
 * Rigurd (That Time I Got Reincarnated as a Slime)
 * Kurobee (That Time I Got Reincarnated as a Slime)
 * Medhimama (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)

Class-4

 * Rimuru Tempest (Homeroom Teacher) (That Time I Got Reincarnated as a Slime)
 * Shiroe (Class Rep) (Log Horizon)
 * Yōji Itami (Vice Rep) (Gate)
 * Kirito (Sword Art Online)
 * Asuna (Sword Art Online)
 * Eugeo (Sword Art Online)
 * Leafa (Sword Art Online)
 * Sinon (Sword Art Online)
 * Benimaru (That Time I Got Reincarnated as a Slime)
 * Shuna (That Time I Got Reincarnated as a Slime)
 * Shion (That Time I Got Reincarnated as a Slime)
 * Souei (That Time I Got Reincarnated as a Slime)
 * Piña Co Lada (Gate)
 * Tuka Luna Marceau (Gate)
 * Lelei La Lelena (Gate)
 * Rory Mercury (Gate)
 * Yao Haa Dushi (Gate)
 * Naotsugu (Log Horizon)
 * Akatsuki (Log Horizon)
 * Nyanta (Log Horizon)
 * Tohya (Log Horizon)
 * Minori (Log Horizon)
 * Isuzu (Log Horizon)
 * Rundelhaus Code (Log Horizon)
 * Tetra (Log Horizon)

Class-8

 * Masumi Shirase (Homeroom Teacher) (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Mamako Oosuki (Class Rep) (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Hakuto Kunai (Vice Rep) (Demon Lord, Retry!)
 * Hajime Nagumo (Arifureta: From Commonplace to World's Strongest)
 * Yue (Arifureta: From Commonplace to World's Strongest)
 * Shea Haulia (Arifureta: From Commonplace to World's Strongest)
 * Tio Klarus (Arifureta: From Commonplace to World's Strongest)
 * Kaori Shirasaki (Arifureta: From Commonplace to World's Strongest)
 * Taichi Nishimura (Isekai Cheat Magician)
 * Rin Azuma (Isekai Cheat Magician)
 * Myura (Isekai Cheat Magician)
 * Lemiya (Isekai Cheat Magician)
 * Aeria (Isekai Cheat Magician)
 * Cassim (Isekai Cheat Magician)
 * Masato Oosuki (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Wise (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Porta (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Medhi (Do You Love Your Mom and Her Two-Hit Multi-Target Attacks?)
 * Aku (Demon Lord, Retry!)
 * Luna Elegant (Demon Lord, Retry!)
 * Yu Kirino (Demon Lord, Retry!)
 * Isami Tahara (Demon Lord, Retry!)

Class-12

 * Petelguse Romanee-Conti (possible Homeroom Teacher) (Re:Zero − Starting Life in Another World) 
 * Verdia (possible Class Rep or Vice Rep) (KonoSuba)
 * Clementine (possible Class Rep or Vice Rep) (Overlord)
 * Mary Sioux (The Saga of Tanya the Evil)
 * Gelmud (That Time I Got Reincarnated as a Slime)
 * Kyo Ethnina (The Rising of the Shield Hero)
 * Zorzal El Caesar (Gate)

Teachers

 * Erich von Rerugen (The Saga of Tanya the Evil)
 * Adelheid von Schugel (The Saga of Tanya the Evil)
 * Pandora's Actor (Overlord)
 * Gazef Stronoff (Overlord)
 * Luna (KonoSuba)
 * Wilheim van Astrea (Re:Zero − Starting Life in Another World)
 * Hakuro (That Time I Got Reincarnated as a Slime)
 * Kouichirou Hazama (Gate)

Others

 * Kurt von Rudersdorf (School Principal) (The Saga of Tanya the Evil)
 * Hans von Zettour (Head Teacher) (The Saga of Tanya the Evil)
 * Wiz (nurse) (KonoSuba)
 * Master (Chef) (Restaurant to Another World)

Multiverse Unite!
Crossover with Jump High and Kingdom Hearts: Cartoon School's Adventures.