Goron Island! Where else?!
At the Goron island dungeon
beat the goron temple
goron temple
southeast
You get it by clearing out the dungeon in the Goron temple. On Goron island.
In the temple
You get the Bombchus as the main item in the Goron Temple.
In the temple on Goron Island
goron temple
well i cant TELL you but i you-tubed it(=-)
the bombuchu bag is on goron island
In goron island get to the temple. Defeat dongorongo and you will get the crimsonine