how many days do you need to do disneyland paris
Many of the attractions there are cloned from other Disney parks, and the only non-clone I'd recommend is Crush's Coaster. Given the typical crowds at Disneyland Paris, you really need a full day at Disneyland Park to do everything plus another 2/3 to a full day for Walt Disney Studios Park. If you do want to visit both parks in one day, I would recommend arriving at least 45 minutes before the Studios park opens (an hour would be ideal).