Kamen Rider Hearts (KH crossover with Kamen Rider Decade)

Okay, so I wrote this quickly based off a failed RP I made to prove a point to someone. Anywho, a few notes.
1. Sora has the Kingdom Keyblade at the start of the story so his Kamen Rider Hearts form looks like his clothes from KH2 have merged with his keyblade with an added helmet although he is still holding his keyblade.
2. You'll have to excuse my mispellings or mistakes, it is very late for me and I can barely see my keyboard. Just tell me about any major ones and i'll fix them.
3. I made it so it could work as cannon but since its fan fiction it obviously doesn't.
4. Please for the love of god do not quote this post.
5. I do realise it is short but i'm not going to write something big if i'm not much of a writer. But depending on if people like it I may continue even after proving my point.

Anywho on with the story:

Prologue

When Decade travels through the 9 Rider worlds he is accidentally thrown through a hole in time. He appears in a new world, nothing like the nine Rider worlds. He appeared in Hollow Bastion, invading the story of KH2 and altering its timeline. He begins to travel through the worlds of Kingdom Hearts to restore balance and find his way back to his dimension but as he does so more Riders fall through into Kingdom Hearts and heartless similar to the monsters from the nine Kamen Rider worlds appear.

Chapter 1: The Passing Through Kamen Rider

Sora receives a message from Leon that a strange man has appeared in town. Sora, Donald and Goofy rush back in the gummi ship to discover Tsukasa Kadoya wandering around the ruins of the old castle. They ask him who he is and what he is doing here but before he could answer the Heartless attack. Tsukasa transforms into Decade but as soon as he does Sora’s keyblade reacts to the transformation and transforms Sora into Kamen Rider Hearts. With Sora’s new power he easily defeats the Heartless and questions how it happened, he discovers his new form allows him to change his appearance and powers based on his keyblade. After the fight Decade leaves without a word while Sora is marvelled by his new power with Donald and Goofy joining with the awe .

Sora continues to ponder about his strength as they walk back towards Merlin’s home.
“Say ,Sora? Who was that weird fella’?â€, Asked Goofy in his usual tone of intelligence masked by idiocy.
“I don’t know, he wasn’t like anyone we’ve met before right?â€, Sora replied followed by a question.
Goofy shrugged and shook his head. He didn’t know and obviously Donald wouldn’t know either. By the time they had finished talking they arrived at Merlin’s house. Upon entry they where greeted by Leon who seemed to want answers.
“So, did you find him?â€, he asked in a laid back yet strong tone.
“Yeah, but we couldn’t figure him out and before we could ask him anything the Keyblade reacted to his powersâ€, Sora explained.
“This could be either bad or good. I’ll go with you to find him againâ€, Leon plotted, “I think I might be able to talk with him betterâ€.
“Hey! What’s that supposed to mean?â€, Sora asked by yelling.
“Whatever you thinkâ€, Leon said leading them outside.

As soon as the four of them where outside a spark of lightning a few feet ahead of them began to expand, gradually turning into a rip in space. After a figure stepped out the rip closed up without a trace and a man in strange armour similar to that of Decade’s was there. Although this one was also red and looked like a bug it was not the same as before. A different Rider.
“Who’s that?â€, Sora asked summoning the Keyblade to his hands and preparing to fight.
“Like I’d knowâ€, Leon replied with arrogance while drawing his Gunblade.
The man before them turned his head slightly to look towards them. Glaring directly at them through his helmet to him they where hostile but unsure if they where friend or foe just as Sora and his friends thought. Tsukasa stod on top of a house high above the scene.
“So Kuuga’s here?â€, he said in a calm questioning manner.