Shiny species don't have a special animation - just a different colour. The colour of the Pokémon, shiny or otherwise, will be known when you first get it to appear.
You have to guess. ..Hey, I’ve got a new Catcher suggestion here! Gonna post it on the real thread. Edit: Wait, didn’t see your post Eclipse! Sorry >_<
I like how when new mons are discovered or released, we all work together to hunt and share locations. It's always exciting stumbling upon something new. The extra incentive to post for leveling up/evolving is also nice.