I mean they have to be, they’re *fossil Pokémon.* They can’t have just been there on their own, someone had to resurrect them from the dirt first and introduce them to the island from outside before they could breed here
Of course, just like in real life, the environment can ruin your shots. Like, say, *the NEO-ONE spilling over a sandfall when you’re trying to take a picture of a glowing flower*