"Supercolossal" (超巨大 Chōkyodai or 초거대 Chogeodae) is a series of high-Level/Rank Machine monsters used by Mayday and Brooke Walker in Yu-Gi-Oh! ZEXAL. Only the Xyz Monsters were released in the TCG/OCG, but more members are featured in Yu-Gi-Oh! ZEXAL World Duel Carnival. All monsters of this series are WIND, except for the WATER "Unsinkable Titanica".
They appear to be based on famous ships and aircrafts (both of which are infamous for being involved in disasters, which is likely the point), with the exception of their Xyz Monsters, "Skypalace Gangaridai" and "CXyz Skypalace Babylon", which are both based on ancient states.
"Skypalace Gangaridai" and "CXyz Skypalace Babylon" are a part of this series since they are also flying aircraft, and their Japanese and Korean names include "Supercolossal" in them.