I so finish a stage 4.

however, there's one final boss. 

Scott, villain was going to play as Albert.

Albert's durability:

Using teleport shadow, and

He spends a lot of time in the dark.

Weapons:

Knife and chainsaw

He uses a knife as a weapon against a player.

When he spends a lot of time in the shade

He has a chainsaw that can kill you.

Upon the backscreen turning and him approaching you

so Scott removed Arthur.