What was the first known fan-made character back when Five Nights at Freddy's was first released?

In Five Nights at Freddy's 5 we all come to know that there are 5 animatronics, but there was one animatronic that we come to know later on that was never included. Why did Funtime Chica never appear in Five Nights at Freddy's 5?

Why does Scraptrap from Five Nights at Freddy's 6 look oddly different from the Springtrap we're all used to in Five Nights at Freddy's 3?

Candy's Adventure!! - FanArt

Who is Yenndo from Five Nights at Freddy's 5, and what is his purpose in the storyline of Five Nights at Freddy's 5?

Bonnie

Hello Everyone! I would like to shout out @Orror for this fantastic fan art of me!

Go check him out: https://gamejolt.com/@Orror

Thank you. @Orror

What was Circus Baby's original pizzeria that she originated from?

Foxy

Why does Nightmare Foxy from Five Nights at Freddy's 4 convert into a plushy when you check on him every time?