Using showsprite on a sprite on a different map?

Hey guys. I'm modding Emerald, trying to use "showSprite" on a sprite on a different route. It seems as though ShowSprite seems to take the sprite number and assume it's for the current route...

What would be the best way to do this? I have showsprite working if I attach it to a sign on that route, but I tried adding it to the route level script and it didn't work for some reason. Are you still considered to be on the previous route when the level script runs or something?

Thanks!