The Toa Catastras were a toa team that were created by Catalyx. After Catalyx was thrown out of the Enterprise, he was pulled into Chenrotoss's orbit, and smashed into the desert not far away from a group of travelling Cacti. When the cacti went to investigate, Catalyx's energy turned them into toa and gave them a misson: destroy Naju. After being involved in a few fights, and dying a few times, they fused to become Lonka. Lonka and Parkin fought against Metrotitan. Lonka eventually fused with Parkin, put parkin seperated, so the Catastras are stuck inside the bodies of the Toa Yerta.