I don’t remember the plot exactly, but the main character was a boy, he lived with his father, who (I think) was a scientist, and I remember two scenes:
He rode a bike in an awesome way, through every kind of ground;
He read a book with his lizard (which lived in a kind of terrarium behind his bed) on his shoulder.

I think it was an adventure movie. I watched it on TV when I was a child, and I think I didn’t see it entirely.
Perhaps the villain was a woman and she has something to do with the boy’s father

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Is it a cartoon movie?

No, it is live-action… The boy had a kind of messy hair