You have to wait for Atlantis Rises and play lots of stages.
Those Orichalcum Seahorses only appear randomly on every S2 stage during a few days each month.
Maybe take a look here:
You have to wait for Atlantis Rises and play lots of stages.
Those Orichalcum Seahorses only appear randomly on every S2 stage during a few days each month.
Maybe take a look here: