I am 100% convinced that the Pandora, the jewel that Kaitou KID looks for and grants wishes, is actually Kaito himself.
Like, Toichi found Pandora, gifted it to Chikage under the moonlight, saying some romantic shit, and one of them confesses that they want a baby. And that rock goes, Okay! and just... poofs into a baby.
It could even explain why Kaito looks so much like Shinichi! If that's the only baby either of them know and Pandora shaped itself on their subconscious desires, then it easily could have made itself look like Shinichi, but with more of their own features than the Kudos.
It's strange to think that Kaito is the only one in this story who shouldn't have anything to do with any of this. He's not like the other Gosho Boys, who always wanted to be a detective or also, he doesn't have a relative who works for the police. A normal boy with a normal life, who thought his father had died in an accident and tried to move on from it, but ends up discovering that he lived a lie for 8 years, that his father was an internationally wanted thief and was murdered when he refused to look for a precious stone.
So Kaito enters this world of police and criminal organizations just to find out who killed his father, prevent someone bad from finding Pandora and take revenge by helping the police capture the criminals. But even if he treats it like it's nothing, he's slowly breaking down, it's exhausting and progress is almost minimal. I'm looking forward to film 27 precisely because Kaito won't be as positive as always, he's reaching his limit...
Kaito knows that Pandora might actually just be a legend but he keeps searching for why his father 'died' because of this. He devises complex plans, constantly risks his life and handles everything alone. Shinichi got support, he has Heiji, Agasa, Haibara, his own parents and everyone who knows his secret identity but Kaito has no one but Jii, not even his mother helps him (even though she knows more things than him) quite the opposite, she rarely shows genuine support, barely talks to him and is always distant and beyond that (it seems) in the last episode of Magic Kaito 1412, it was she who disguised herself using Toichi's image to shake Kaito, no matter what kind of intention did she have... That was cruel.
He's already gotten too involved to give up and pretend that nothing happened, that he doesn't know any of this, it's complicated and Jii can't stop him from putting himself at risk. Kaito doesn't like stealing, he says that sometimes but he's someone who is very stubborn and unaware of the danger, when he gets it into his head that he has to solve all this, he won't stop until he succeeds.
And even though a lot of people hate him, he never lowers his head or stops helping, he helps the police, prevents people from dying and always tries to put a smile on someone's face regardless of who they are. It's ironic to think that this pervert is such a pure-hearted person, that he feels guilty for not being able to save someone who had tried to kill him moments before...
Aoko volunteers to help Conan with catching Kid :] Kaito got dragged along for moral support since he's "bad at riddles". Shinichi's too bemused to consider calling him out.