Stupid questions, but I always ask these no matter what...

I always thought that the magic of the sacred realm held him in a dormant state, and as it did, his appearance and clothing transformed on their own into the image of the hero of time. Or something like that .

Originally Posted by user77

He went forward in time, he had technically lived life as he normally had and would've ended up looking like that at that age... that's what I imagined...

This is what I thought too its most logical.