Shiny Hunting the verizion, and terrakion, and it would save a ton of time if the sprites showed up shiny before I have to start some long battle intro.
You have to engage in battle to see if it's shiny or not. You can save and soft-reset until it's shiny, but you have to engage in battle to see. The overworld sprite is static-- it will never appear shiny.
Source: I shiny hunt. Lots.