"Chrysalis", known as "Cocoon" (ＣKokūn) in the OCG, is an archetype used by Jaden Yuki in the anime that contains a small group of Effect Monsters shielded in cocoons. They generally have low ATK and DEF values. The cocooned monsters can be released by a number of methods. Commonly, each chrysalis can be Tributed when the Field Spell "Neo Space" is on the field to Special Summon a specified "Neo-Spacian" from either your hand or your Deck. There are 6 "Chrysalis" monsters with six different Attributes. The appearances of Chrysalis monsters look like small and cuter versions of the "Neo-Spacian" monsters.
Despite the TCG version changing the archetype's name to "Chrysalis", many of the support Spell and Trap Cards still feature "Cocoon" instead.