Any V1/2 morphs should work - it's the exact same geometry layout, so anything based on the V1 model. Morphs for V1, V2 or the MilGirls have all been used and work fine. I don't know if anyones tried that one specifically, but if it works for the regular V1 or V2 figures it's fine. The only possible reason to not work is for characters where they've made new body parts and replaced the exisiting V1/2 parts with their own. So Mermaid Tail morphs won't likely work on Shazam's or Vicky's legs :)