Pennywise has sharp, multiple rows of teeth because it is an ancient, shape-shifting cosmic entity that naturally possesses a monstrous "kill form". The sharp teeth are its natural form when it is about to feed, not something it "acquired".
As well as having his right arm bitten clean off, Georgie is trying to crawl away but he was dragged into the sewers and devoured by Pennywise, with an unnamed older woman and her cat being the sole witnesses of the horrific scene, including before Georgie lost his arm.
When "It" is about to eat Beverly, she displays fearlessness to which Pennywise said it was ok and that he knew what would make her scared. He then proceeds to open his mouth hella wide and reveals 3 small lights inside of him. This somehow scares her enough that she falls victim into the floating trance.
It is the only live-action villain role of Tim Curry to be Pure Evil so far. Its 1990 incarnation was the first Pure Evil portrayed by Tim Curry, giving him (Alongside Robin Atkin Downes) the second highest acting and voice acting amount of Pure Evil villains after Jim Cummings.
Pennywise/deadlights can easily eats valak's soul since Valak is a demon but the deadlights is an cosmic entity outside of our universe.. To put it simply, Pennywise is a multiverse threat. And a mere ghost or demon like Valak stand no chance against IT. Pennywise can eat souls and manipulate reality.
IT represents chaos, evil, and fear, while the turtle is a force of kindness led by compassion, making them direct opposites. Both being interdimensional entities, their powers are at the same level, meaning that the turtle could kill IT if it wanted to.
It runs away to tend to its injuries, but Bill, Richie, and Ben chase after it and find that it has laid eggs. Ben stays behind to destroy the eggs, while Bill and Richie head toward their final confrontation with Pennywise.
Essentially, the Deadlights are a universal representation of cosmic evil that powerful entities, like IT and the Crimson King, can access or embody.
In the 2017 It film adaptation, Beverly Marsh witnessed the Deadlights and was put into a temporary coma. She was brought out of the coma by Ben Hanscom kissing her. Upon looking at the Deadlights, Beverly hears sounds of children screaming, including an older person who shouted "HELP ME!!!".
I'll take all of you! I'll feast on your flesh as I feed on your fear... Or... you'll just leave us be... I will take him. Only him, and I will have my long rest and you will all live to grow and thrive and lead *happy* lives, until old age takes you back to the weeds.
A powerful and centuries old being in the form of a clown, Pennywise would awaken in many 27 year cycles of terror, feasting on the residents of Derry, Maine until going back into hibernation deep beneath Derry.
Not-So-Scary Stephen King Books
Pennywise knows of Richie's love for Eddie, so he taunts him with it. The room was filled with clowns, which in the movie were Richie's biggest fear.
Pennywise's Secret Daughter: Meet Ingrid Kersh 🤡 Discover the story of Ingrid Kersh, Pennywise's secret daughter, and her myth as Periwinkle in It: Welcome To Derry!
Pennywise: [Last word] Fear.
The tall man is also an interdimensional being who can manipulate time, space, and death to his liking. He would easily be able fight back against Pennywise's illusions which essentially would make Pennywise weaker. I think the obvious next pick for this would be Pinhead.
Valac is a demon described in the goetic grimoires The Lesser Key of Solomon (in some versions as Ualac or Valak and in Thomas Rudd's variant as Valu), Johann Weyer's Pseudomonarchia Daemonum (as Volac), the Liber Officiorum Spirituum (as Coolor or Doolas), and in the Munich Manual of Demonic Magic (as Volach) as an ...