This is how Mater tells the story of the Ghostlight and encountering Horrificator goes in Horrificator (CTaRAoMToLaCN).
[With Matau and Iago]
Matau T. Monkey: I hope this Gaia Everfree girl is cool. I think.
Iago: But what about Adagio and Sonata?
Percy: Yeah. Horrificator scared them and made them look like they saw... the Ghostlight or something.
Evil Ryan: Yes. I think the Ghostlight got them. Including Megatron.
Megatron: EVIL RYAN! Do... not... mock... the Ghostlight.
Bumblebee: What is that anyway, Mater?
Mater: The Ghostlight is a glowing orb of blue translucent light that haunts the very area of Radiator Springs.
Evil Ryan: [scoffs] Come on, Marrinette. It can't be real.
Megatron: [shouts] IT IS REAL!
Ryan F-Freeman: Nice one. Carry on.
Mater: It all started on a moment like right now. The song dogs were wailin' at the moon off Cadillac Range while the summer wind blew hot like the breath of Zozobra. A young couple was headed down the very Route 66 stretch of the mother road when they spotted an unnatural blue glow... ...and all that was left were two out-of-state license plates. So remember: The one thing that angers the Ghostlight more than anything else is the sound of clanking metal.
[Evil Ryan feels his whole body starting to clank and tries to keep himself still]
Mater: As you head around this buildin' today, keep an eye out. The Ghostlight could be anywhere. Well, good luck. [drives away]
Sci-Ryan: Like the two creature that kidnapped me and Ryan'a teacher. The Demon from Chanterlot High and it's friend, the Great Animal. Well, good luck.
Ryan F-Freeman: So, Odette. You think you can find Adagio and Sonata?
Odette: Yeah. Good luck. [runs off]
[Everyone wishes each other good luck and split up, leaving Evil Ryan by himself]
Evil Ryan: Uh... Good luck.
[as Evil Ryan walks into the building, he sings No Fear to make sure that he feels better]
Evil Ryan: [sings but a bit scared] We're off on a mission~
We're tough in good condition~
We're short but standing tall~
[He suddenly hears a rattle and sees a sillouhette]
Evil Ryan: [gasps]
[It is revealed to be a the staircase]
Evil Ryan: Oh. It's just the staircase.
[Evil Ryan continues on his way]
Evil Ryan: [looks at a photo of Belle and her brother, the Belle version of Ryan called Ryelle] I hope I can do it, Belle. You too, Ryelle.
[Meanwhile, Ryan looks around with Alya and Marrinette]
Ryan F-Freeman: Marrinette? You think Alya knows Ladyan on the Ladyblog?
Ryan F-Freeman: Well, let's hope that Ghostlight story didn't scare Evil me too much.
Alya: Easy, Ryan. I am sure Meg is ok with Adrian.
Ryan F-Freeman: [looks up] Meg.. My Derek.
Alya: Ryan? You ok? And who is this Derek?
Ryan F-Freeman: A Swan Princess character.
Alya: Oh. So. How did you know him?
Ryan F-Freeman: Well. When my friends and I are in Odette's world, I met him when me and Odette are under a swan transformation spell.
Marrinette: You was a... a...
Ryan F-Freeman: Swan? Yes. But, that spell do not last for a day. When the moon is up and shines in the lake, me and Odette will turn into humans.
[Meanwhile, Evil Ryan spots a pink light]
Evil Ryan: Get away from me, Ghostlight!
[But it turns out to be Alix]
Evil Ryan: Oh. It's a girl who was Timebreaker. The Ghostlight is not pink.
Alix: No. That's just my hair. Mater said it was blue.
Evil Ryan: I hope things can't get any worse, Alic.
[Suddenly, Horrificator appears]
Evil Ryan: I guess I talked too soon. [activates his translator] Mylene?
[Evil Ryan looks at his translator and the screen shows "I am no longer a scaredy-cat high school student but..."]
Evil Ryan: Horrificator! [runs off with Alix]
[Meanwile, Crash looks around while Chuck looks through some doors]
Chuck (Angry Birds): No sirens in here.
Chucks (Angry Birds): Nope. Nope, nope, nope.
[Crash sees Evil Ryan and Alix running]
Alix: Split up!
Evil Ryan: [sings panicky] No chance, no choice, NO FEAR!!!~
[Evil Ryan grabs Crash and hides]
Crash Bandicoot: Evil Ryan? You got away from the Ghostlight?
Evil Ryan: Not the Ghostlight. But Horrificator.
Crash Bandicoot: We should be safe. [looks at his phone and see a scene from the Talon Show from Monster High, Ryan saw a spotlight]
Matau T. Monkey: That spotlight looks like the moon.
Ryan F-Freeman: [howls like a werewolf then growls and starts to dance]
Crash Bandicoot: He dance awesome.
Evil Ryan: We could hide in here. [opens a door]
[Evil Ryan saw a hall with an Exit sign and Daffy and Donald Duck wearing Alice's outfit, holding hands]
Daffy and Donald: Redrum.
Evil Ryan: Ummm. Never mind. [closes the door]