Had an idea for a ship side event involving Giratina and Arceus. Giratina had just done something bad that Arceus will punish her for but the usual punishment is ineffective so she decides to get creative. She decides to punish Giratina by telling an embarrassing story to other legends of when Giratina was young. The story can be that Giratina had been scared of a cute fluffy and small Pokémon (I don't know which to choose) that is completely harmless yet utterly terrifies Giratina that it is the reason she stayed in her dark dimension where the MC found her because it is not there. Giratina tries to act tough and say she was never scared of it but when a legend lies saying that Pokémon is behind her, she jumps like a cat to a loud noise.
Also had an idea for a side scene of Koraidon and Miraidon when the MC gets them both. They would race each other to determine who the MC will ride on and ends up a tie for the MC to choose the winner. The chosen winner would have the MC ride her to a location that the legend likes. For Koraidon it would be through rough terrain and up cliffs to the top. For Miaion it would be through more developed city area. Both go extremely fast that the MC hangs on for dear life. Once at the destination the legend would say they ran out of fuel and need a top up of the kind the MC makes lots of.
Also a potential idea for their dreams could be for Koraidon be something about being in a race against other prehistoric Pokémon. For Miraidon be she dreams she is the light cycle from TRON.