"Chrysalis", known as "Cocoon" (ＣKokūn) in the OCG, is an archetype of Level 2 monsters used by Jaden Yuki in the Yu-Gi-Oh! GX anime that contains a small group of infant monsters shielded in cocoons that resemble smaller and younger versions of the "Neo-Spacian" monsters. The cocooned monsters can be released by a number of methods. Commonly, each "Chrysalis" monster can be Tributed when the Field Spell "Neo Space" is on the field to Special Summon a specified "Neo-Spacian" monster from your hand or Deck. There are six "Chrysalis" monsters, each with a different Attribute and Type. They also each have 200 ATK and DEF less than its corresponding "Neo-Spacian" monster. With the exception of "Chrysalis Dolphin", each "Chrysalis" monster has the same Type as its "Neo-Spacian" counterpart.
Despite the TCG version changing this archetype's name to "Chrysalis", many of their support Spell and Trap Cards still feature the word "Cocoon".