This is the first time we see adult Wyatt as a good Witch.
Good adult Wyatt says he's 25 years old, but in magical school Leo says in the next 25 years the cursed teddy bear would slowly turn Wyatt evil meaning future Wyatt would be 27/28 (which was Wes Ramsey's age at that time). Edit: Leo just rounded the number 23 into 25. People tend to round numbers to the closest digit ending in 5 or zero.
Title is based upon the childhood concept of imaginary friends.