The next day
With futoshi
As he is on a bed in genta lab where genta is upgrading the rust driver.
"Almost there and done" said genta happily as futoshi gets up and look at the driver and then said "it looks the same as before"
"Yeah but only on the outside but it's different in the inside and all you need to do is focus all your power and energy into the driver and you can turn into your oxidize form again and also remember you can only use the form for about 5 minute" said genta.
"Oh okay well thanks professor" said futoshi with a smile as he then hears people screaming outside. "I gotta go" said futoshi as he gets up and run outside. "Be careful" said genta.
With futoshi
As he goes outside he confronts the scretals and then see grong the gorilla scretal along with 4 tin scretals,a boar,bear and lizard scretal.
"So you came Rust" said grong. "Yeah and you must be one of the knights" said futoshi. "That's right, I'm grong one of the four knights and your end" said grong.
"We see about that" said futoshi as he summons his driver and he then said
"Henshin"
As he turns into Kamen Rider Rust.
"I am Kamen Rider rust" said futoshi. "Get him" said grong to the other scretals as they ran towards futoshi, he then do a pose and said "Rust up" as he turns into Kamen Rider Rust oxidize shocking the scretals.
"Kamen Rider rust oxidize" said futoshi as the scretals get over their shocked continue to ran towards him and try to attack him.
"Rust tackle" said Rust/futoshi as he's entire body is coated in green energy and ran towards them and as he hits them, he then destroyed the 4 tin scretals and the boar scretal while damaging the lizard and bear scretal blowing them away to the ground and as rust gets closer to the lizard scretal and as he gets up futoshi punches the lizard scretal hard in the chest with his left fist making him explode and he then looks at grong and the bear scretal.
"It's just you now" said futoshi. "So you have gotten stronger ,tch we settle this next time" said grong as he gets away while leaving the bear scretal behind.
"Hey wait" said futoshi/rust as he tries to follow grong but lost him.
"He got away" said Rust/futoshi as he changes back to his default form and tsukasa appears.
"So you're this world's Kamen Rider, Rust" said tsukasa.
"Hmm who are you and what do you mean by this world" asked futoshi. "Just a passing through Kamen Rider remember that" said tsukasa as he pulls out the decadriver and put it on his waist,pulls out a card from his ride Booker and said
"Henshin"
"Kamen ride: decade"
As tsukasa turns into Kamen Rider decade surprising futoshi and decade then pulls out another card and insert it to the decadriver.
"Attack ride : slash"
As decade's ride Booker turns into a sword. Decade/tsukasa and the bear scretal then charges towards each other and tsukasa slash the bear scretal twice making back away a bit and he then fights back by swinging his claws towards tsukasa who blocks and dodge them and he then kicks the bear scretal and pulls out a card.
Final attack ride : Decade
Decade/Tsukasa jumps and go into the card images and kicks the bear scretal making him explode.
"You, you're a Kamen rider" said futoshi shocked as he de-henshin and so did Tsukasa and said "let's talk somewhere else"
Later on
"I see so that's your story" said Tsukasa as futoshi just told Tsukasa about his story. "And you're a Kamen Rider from another world and there are other riders out there" said futoshi shocked as Tsukasa told him about the other riders in other worlds and about himself and after they properly introduced each other.
"So why did you came to this world, are you here to destroy me or something" asked futoshi.
"I actually just came to this world to visit and to take photos" replied Tsukasa as he use his camera to take a picture of futoshi.
"Whatever I don't really have much reason to fight anymore but I still want to live" said futoshi as Tsukasa looked at him and they then heard people screaming.
"Scretals" said futoshi as he goes while Tsukasa stays and said "let's see what you can do rust" as he also goes.
Later on
As they arrived they then saw people running and screaming and grong and a moose scretal.
"You're finally here rust" said grong. "Let's finish this once and for all" said futoshi as he summons his driver and tsukasa pulls out the decadriver and then pulls out a card and then he and futoshi said
"Henshin"
As Tsukasa puts the card on his driver.
Kamen ride : decade
As Tsukasa and futoshi turns into their rider forms
"What" said grong shocked seeing decade. "You just who the hell are you" said grong. "Just a passing through Kamen Rider remember that" replied decade and then two new cards appeared from the ride Booker and decade then insert one of the cards to the decadriver
Final form ride : rust
Decade said "this might tickle a bit"
"Huh" said Rust as decade puts his hands on his back and Rust then became a big mechanical grasshopper and shocking Rust and the the scretals and then Rust snap out of his shocked and start attacking the two scretals by slicing them, damage them and as Rust was about to stab them grong dodge but the moose scretal didn't and then Rust stabbed the moose scretal with his grasshopper hands making him explode.
"Time to end this" said decade as he inserts the other card to the decadriver.
Final attack ride : Rust
"Rust then jumps and his grasshopper hands glows and then shoots a slash energy attack towards grong damaging him a lot and as Rust lands he jumps again and so does decade as he jumps and then jumps again from rust and insert another card
Final attack ride: Decade
and then both he and Rust then kicks grong making him explode and dies in pain.
As they landed on the ground they both de-henshin.
Later on
"It was okay meeting you I guess" said futoshi. "You too and don't be too much of an emo" said Tsukasa.
"Fine but you also don't be too much of an asshole" said futoshi. "Then forget what I said bye" said Tsukasa as he opens a dimensional wall and goes away.
With oaksys
"Are the salvagers ready Hana" asked daigo. "Yes chief" said Hana showing him the tank/robot vehicles. "Good now we have a better chance to ending this war" said daigo.
With the scretals
"Hmm so grong died huh well whatever I never liked him and there's another rider from another world interesting isn't it kaa chan" said the rhinoceros beetle scretal.
"Don't underestimate Rust rhiheart" said the scretal queen with a hiss.
"I got,I got it kaa chan" said rhiheart the rhinoceros beetle scretal.
"I fight and kill him it's just a matter of time" said rhiheart arrogantly.
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kamen rider rust
FanfictionThe picture came from riderboy and armoredcrustacean from deviantart and I do not own Kamen Rider This story is about in an alternate universe where a missile was launched causing an apocalypse, turning both humans and animals into kaijin called scr...