i remember it's a movie about this shapeshifter creature that can turn into any object
and there's a boy and a girl. at first the shapeshifter turn to a bicycle (i think). the owner of this shapeshifter is the boy...

that's all i remember...

if someone knows what anime is this,
please tell me the name...

thanks 😀

Is it "children who chase lost voices"? (I haven't seen the whole movie but there was some shape shifting blob iirc)

Is it Cencoroll?

YES! it is Cencoroll. Thank You 🙂