Ewwww.
They can't mix all the games together anyway, because they all happen at different times.
Gen 1 and 3 happen at the same time, but gen 2 and 4 happen three years later. Gen 5 happens an undefined amount of time after 2 and 4.
They can't mix all the games together anyway, because they all happen at different times.
Gen 1 and 3 happen at the same time, but gen 2 and 4 happen three years later. Gen 5 happens an undefined amount of time after 2 and 4.