Originally from Five Nights at Freddy's 1, Foxy the Pirate in Five Nights at Freddy's 1 was very inactive in Night 1, and would only kill the player if cameras are not checked. Night 2, however, he comes much more active. While the nights progress, Foxy would become more active.
Now, in Five Nights at Freddy's 2, he becomes active in Night 2. You can spot Foxy in the hallway, so flash your flashlight at him for him to run away.
In Five Nights at Freddy's 3, Foxy will attack the player on Night 3. Foxy will stand in your office and look at you. Eventually, he will jumpscare you just like any other phantom animatronic would.
In Five Nights at Freddy's 4, Foxy sneaks into the closet and stays in there. You now have one more animatronic to deal with. To not be killed by Foxy, check the closet occasionally. Once checking on Foxy, he may snap you. Quickly close the closet and hold. If you refuse to do so, you may end up with a jumpscare.
In Freddy Fazbear's Pizzeria Simulator, he's in UCN. He hangs out in Pirate's Cove, along with Bonnie. They will take turns looking out. Unlike Bonnie, he will be invisible to the camera. Soon later, he will run through the hall, like how he did in FNAF 1.
'Foxy's Tale' Five Nights at Freddy's Song Muse of Discord