Some doodles to prove my points in my theory, I guess. If this doesn’t happen in game I might be a lil upset? I’ll def write a fanfic on it if it isn’t the case in game but to summarise:

Hop and Leon are descendants of a royal galarian bloodline.

Hop is connected to Zacian, whereas Leon is connected to Zamazenta.

They are able to wield their weapons and activate their powers.

The sword, when activated, can cut through anything. The shield can block any attack.

Depending on what version you get, you will be able to ride on Zacian with Hop or Zamazenta with Leon.