Quick question, what's with the shiny ditto that can appear in the lab? Like the one ditto at the top with the pokeball. It's shiny for me sometimes and when I click on it, it disappears. Please help

This game/website is very interesting. A lot different than normal pokemon games of course, yet I started enjoying it fairly quickly. I'm not used to things like this but they did a good job on making a system that makes sense to me. I'm very slow at understanding things so I was skeptical at first during the tutorial. But boy am I glad they gave me a tutorial because I was getting lost left and right. If anybody ever sees this, well you just read a review.