This is how Ryanosa reveals his true colours goes in episode 20 of Crash's, Thomas' and Ryan's Adventures of Total Drama: Island.
[Sci-Ryan gives a confused look]
Sci-Ryan: Ryanosa? But I'm sure that Meg Spruce was the one to make it seem like Ryan Everfree is back, Odette.
Sci-Ryan: It was you who tried to scare everyone away?
Ryanosa Daisy: I would never try to scare anyone away from Camp Wawanakwa.
[Odette grabs Ryanosa's hand and her eyes turn white. She sees a memory of Chris making a deal with Human Filthy Rich and Ryanosa listening in on their conversation]
Chris McLean: Yeah. You can have the camp. It's all yours.
Filthy Rich: You are much more kinder than my last costumer.
Ryanosa Daisy: [runs in] Please. My great grandparents founded this place. It's been in our family for generations! You have to let the camp stay!
Filthy Rich: Instead of turning it into a spa resort that will line my pockets with more money than this camp ever could? [chuckles] I don't think so.
Chris McLean: Yeah. Come on, kiddo. Give the guy a chance.
Ryanosa Daisy: P..Please! I... I... just need a little more time!
Filthy Rich: Fine. I'll give ya till the end of the month.
[He and Chris leave while Ryanosa starts to tear up]
Ryanosa Daisy: What'll I do? [sobs]
[He saw sparkles in the sky and follows it to a mine]
Ryanosa Daisy: Huh?
[He suddenly falls over]
Ryanosa Daisy: Oof. [coughs] Whoa.
[He goes over to a rock holding different coloured geodes]
Ryanosa Daisy: What are those? I'll touch these. [places his hand on the geodes]
[Then, he feels a surge of magic as he tries to pull his hand off the rock]
Ryanosa Daisy: What's going on?!
[He got free then saved by vines]
Ryanosa Daisy: Whoa.
[Back at the cabin]
Meg Spruce: You don't know what those are.
Ryanosa Daisy: But, I know what they can do![uses his magic to make plants appear] My sister taught me that! I can control thier power now!
Meg Spruce: You don't know that for sure!
Ryanosa Daisy: This is our camp, and it's being taken away! If this has to be our last week here, I'm going to use whatever it takes to make it count!
[A playback of the boat incident plays]
[Ryanosa uses his magic and the plants push the boat along too fast]
[The boat crashes into the dock]
Ryanosa Daisy: Ohh. That's gonna leave a mark...
[Back to Meg Spruce]
Meg Spruce: You were using magic all over the place! Bertram had to tell them something to cover for you! What did you want me to tell him to do?!
Ryanosa Daisy: I just want you to tell Bertram he haven't told his friends that stupid story!
[Ryanosa walks off angry]
Meg Spruce: Ah, this is all too much for you! You have to let it go!
[Back in reality, Odette's eyes return to normal]
Sci-Ryan: Odette? Are you ok?
Odette: Yeah. [realizes something] Your sister wasn't telling you to let go of the camp.
Sci-Ryan: She was talking about you letting go of the magic of the geodes. [to Odette] Right?
Sci-Ryan: All those things you were doing to make this week the best week ever. Every time you used magic to do them, you caused another problem somewhere else! Your sister was telling Bertram to... cover for you!
Ryanosa Daisy: How do you and your Swan Princess friend know I was doing with the geodes? How do you know about the magic?
Odette: Some of us can see things. Feel things. Because they and me have magic, too. [points to Sci-Ryan] And so does he. And so do our friends.
Sci-Ryan: Look. Ryanosa. Your sister is not wrong. I would say Twilight's line but, I'll let this tell you. [pulls out a tape recorder and pressed the play button]
Sci-Twi: Maybe you should stop using magic. Too much of it can be dangerous if you can't control it.
[Sci-Ryan pressed the stop button]
Ryanosa Daisy: Oh. Don't worry. I got this. And I will use magic to save my camp and this season of Total Drama: Island. I just need more power!
[Ryanosa reaches for the two geodes]
Sci-Ryan and Odette: Ryanosa, don't!
Ryanosa Daisy: I have to! [uses his magic to tie them up in vines]
Sci-Ryan: Oooh!! Odette! What is he doing!?
Odette: He's about to grab the last two geodes he needs to make his necklace complete.
[the two geodes float to Ryanosa's hand]
Sci-Ryan: Ryanosa! NO! Not your necklace! You do not know what they will do!
[Ryanosa adds the final two geodes to his necklace and transforms into a plant manipulating Gaia Everfree-like demon named Ryan Everfree]
Sci-Ryan: Oh my...
Ryan Everfree: Sorry, CPA Student and Swan Princess. But I know what I have to do. Like Gloriosa, I feel like we are not on the same page. So...
[Sci-Ryan and Odette struggle to break free]
[But Ryanosa doesn't listen and uses his magic to close up the mine]
Sci-Ryan and Odette: NOOOOOOOOOOOOOOO!!!!!
[Back at the campsite]
Ryan F-Freeman: Puffin? Where is Sci-Ryan and Odette?
Puffin: Probably went to spend some time together.
Sci-Twi: But they're gonna miss the challenge.
Evil Ryan: Who cares if they miss it?
Jean-Bob: I hope Odette is OK, Evil Ryan. We could start without them.
Sci-Twi: [to DJ Pon-3] Whenever you're ready!
[DJ Pon-3 starts playing music]
Crash Bandicoot: Ever since that Swan Princess adventure, Ryan. You had got used to your swan form when the spell is put on you.
Ryan F-Freeman: Yeah. But right now, we've got a dance off to win.
Crash Bandicoot (EG): Yeah. I guess.
[They don't notice Ryan Everfree is in the forest nearby. He floats off the ground and towards the campsite, brambles growing behind him. Snails and Snips hear a noise and notice Ryan Everfree]
Snips: He looks... different.
Snails: Yeah. He looks... taller.
[Evil Ryan senses Ryan Everfree]
Evil Ryan: Guys.
Bertram T. Monkey: What is it, Evil Ryan?
Evil Ryan: I can sense something.
Evil Anna: Who? Unicron?
Evil Ryan: Not him. Something even worse.
Evil Anna: Like what?
Evil Ryan: Like someone who can manipulate plants.
Bertram T. Monkey: Like Ryan Everfree can?
Evil Ryan: Yeah.
Evil Anna: I'll stop this music.[stop the record player]
Heather: Why did you stop the mus- [gasps]
Human Rarity: Oh, my goodness.
Ryan Everfree: Attention, campers.
Sorina: It's Ryan Everfree!
Meg and Derek: HE'S REAL!!
Flain: YIKES! WE ARE DOOMED!
Gloriosa Daisy: Ryanosa? What are you doing?!
Spikewave: That's Ryanosa?
Codylight Sparkle: Are the Cyberlings crazy or are his feet not touching the ground?
Matau T. Monkey and Human Pinkie Pie: Freaky Deaky.
Ex-Terminator: That is very strange.
Ryan Everfree: Filthy Rich wants this to be the last session at Camp Wawanakwa.
Rianna F-Fiona: Where's Sci-Ryan and Odette, Ryanosa?
Ryan Everfree: Around. Somewhere. But don't worry. [readies his magic] I got this!
[Ryan Everfree uses his magic to create a wall of brambles which destroys the newly built dock]
Human Rainbow Dash: Aw! Come on! We literally just finished building that!
Daffy Duck: Welcome to my world.
[The song We Will Stand for Everfree starts playing as Ryan Everfree continues to use his magic]
Ryan Everfree: I have waited for the day~
[Crash Bandicoot growls]
To send this greedy wolf away~
[He punches Crash aside]
Now the magic is my salvation~
Gather close in my protection~
[He charges his magic]
Sci-Twi: He's getting stronger!
Ryan Everfree: Stand for Everfree!~
[He uses his magic as he sings and more brambles grow]
Bertram T. Monkey: [screams]
Ryan Everfree: Behold the beauty of nature~
In all it's glory~
No need to fear the vultures at the door~
[He grows more plants as he sings]
[She and some other campers hide as Ryan Everfree approaches the spa-hotel]
Ryan Everfree: Right here, you have me to protect you~
Within these walls of thorns~
[He grows more brambles in front of the hotel as Courtney tries to defend her friends]
For Everfree, forever more~
Evil Ryan: What do we do!?
Madam Magianort: I don't know!
[Evil Ryan thinks then an lightbulb appears above his head]
Evil Ryan: I got it! [summons his Oblivion Keyblade]
Madam Magianort: Good thinking.
Gloriosa Daisy: Let me help. [grabs an axe]
Matau T. Monkey: Me too! [grabs a chainsaw]
Evil Ryan: Magianort! Summon your Keyblade!
Madam Magianort: Okay. [does so]
[They quickly start cutting the brambles but more grow back]
Evil Ryan: Hurry!
Ryan Everfree: They have come into our domain~
Here to seal our camp in chains~
Matau T. Monkey: Oh no.
Evil Ryan: Stay back! I'm well armed!
[But he uses his magic and plants grab the thing they are holding]
Ryan Everfree: But we have held it for generations~
Madam Maginort: Hey!
Matau T. Monkey: Come on!
[Ryan Everfree thrust his arm up and the vine copy the movement]
Ryan Everfree: This is just a complication~
Evil Ryan: Ugh!
Matau T. Monkey: HELP US!
Ryan Everfree: Stand for Everfree!~
[He uses more magic and the brambles grow higher]
Flain: Oh no!
Kaos (EG): This is not good.
Ryan Everfree: Trust in me, this is for your own good~
Don't be afraid~
Nature is our friend~
Emmet: I'm not afraid of you!
Ryan Everfree: [uses his magic to grow a flower] All of this beauty that surrounds us~
Every lovely bloom~
Designed to defend~
Bromley: Oh, great.
Evil Rianna: Not good.
Ryan Everfree: Let them come, just let them try~
[He grabs Evil Rianna as he sings]
I'm not about to say goodbye~
This camp will be here throughout the ages~
Written into the history pages~
[He floats into the air with her as he continues to sing]
Evil Rianna: Okay, not funny.
Garfield (EG): Not good.
[Ryan Everfree uses more of his magic while in mid-air and the brambles grow higher]
Ryan Everfree: Stand for Everfree!~
[Ryan gasps. In Ryan's mind, Dark Ryan is helping Everfree Prince Gale to find a portal out of Ryan's body]
Everfree Prince Gale: And why you want to help me?
Dark Ryan F-Freeman: Because, if Ryan is going to stop Black Ryan becoming a part of him, we need to help him and embrace the magic in him.
[Gale nods and opens a portal]
Everfree Price Gale: Ok. You remember what I look like in my legend?
Dark Ryan F-Freeman: Yeah.
Toa Hordika: Excuse me. Are you taking me for this mission?
[They nod and goes into a portal]
[at the campsite]
Ryan Everfree: [laughs] Oh, you won't free Sci-Ryan and Odette, Ryan Prime. And once I sealed this camp away from Filthy Rich, I shall rule Equestria and Cybertron.
Sunset Shimmer: Ryanosa!
Bertram T. Monkey: I don't think that's Ryanosa anymore, Sunset. His heart belongs again to darkness. All worlds begin in darkness. And also end. The heart is no different. Darkness sprouts within it. It grows, consumes it. Such is its nature. In the end, every heart returns to the darkness whence it came. Master Xehanort taught me that.
Matau T. Monkey: Bravo, Bertram.
[Ryan notice Everfree Prince Gale, Toa Hordika and Dark Ryan come out of the portal]
Emmet: What are we going to do, Gloriosa? What would Sora and Ryan do? What would Gaia Everfree do?