What is the rarest shiny in insurgence?

Not counting any spindas.

if roaming legendaries are determined when creating the save file or they have a chance to be shiny when u encounter them again and again if it’s determined on the start roaming legendaries are

Already answered almost a year ago

Tldr: it’s cressilia cuz roaming legend and the fact you can’t use shiny charm cuz it stops spawning once you have it registered in the Dex. Iirc the odds of randomly obtaining shiny cress are 1/65k. There’s always pokepon but it’s extremely slow