This page will best a list of all the universal prison inmates. Some more noteworthy monsters such as Link Nukem's daughter or Gananllitron will have their own pages but almost every other monster will be listed on this page. WIP
Listed below is a a gold standard to follow with this list:
Super Atomic Boo

Super Atomic Boo
Super Atomic Boo is a class SS monster.
Boos
Boos are class C monsters.
Little Devil
Little Devil is a class SS monster.
Shadow Toad
Shadow Toad is a class A monster.
Lazy Doopliss
Lazy Doopliss is a class A monster.
Shiny Amayzee Dayzee
Shiny Amayzee Dayzee is a class A monster.
Baby Shiny Amayzee Dayzees
Baby Shiny Amayzee Dayzees are class B monsters.
Overlord Majin
Overlord Majin is a class SS monster.
Dark Sleepy Bones
Dark Sleepy Bones is a class A monster.
Dark Lazy Bones
Dark Lazy Bones is a class A monster.
Dark Armos
Dark Armos is a class A monster.
Sharp Eyes
Sharp Eyes is a class A monster.
Overlord Zenon
Overlord Zenon is a class C monster.