Chrono Cross[]

The Rainbow Shell appears in Chrono Cross in the form of several fragments, suggesting that in the previous years, the Rainbow Shell was indeed stolen from the Kingdom of Guardia and disseminated across the world, eventually arriving in El Nido. These Rainbow fragments are the highest weapons and armor grade material available, affording items of legendary quality. However, use is limited and probably confined to Serge's party, as the forging of such items requires the work of Zappa using the Master Hammer (and his dimensional counterpart working with him!) as well as the integration of shiny items imbued with elemental power and resulting from the use of Summons.