Bluegway -> Pewgway

Hello everybody! Please help me.
My Bluegway has 32 lv, but i need catalyst to evolve him in to the Pewgway.
Where can i find this item?

P.S. Sorry for my Enlish)

all epics except draconius need a catalyst and they all work the same way when it comes to finding one, in normal mode (first play through) you meet the epic monster. in veteran mode (second play through) you get that monster's scroll. in expert mode (third play through) you get the catalyst. in this case its miracle sea expert mode

Ancient Coral can evolve Bluegway into Pewgway, I got 1 from crystal chest.

yea you can get em from chests too, but finding the one you need is a pain lol

you can get it at Miracle Sea Expert.