there is no bomb bag in bannan island. you have to get it on isle of gust
You can't get a bomb bag on Bannan Island. There are two bomb bags in the game, one is inside a temple, and you have to buy an upgrade in order to hold 20 bombs (I forgot what temple, and how many Rupees it is)
put a bomb on the cyclone and hit it
u get it in the temple of gust
You may not be there yet, but the Bomb Bag is the second dungeon's main item (The Temple of Wind).
bannan island. you go through the cave and bomb the rocks. you can play a minigame there
wind temple
the bomb mask( if it has a skull on it)
Bomb the right cyclone and the bomb will hit the boss.
You get it in the temple of wisdom.
You have to do the isle of gust and you`ll get it!
windfall island
im pretty sure you have to buy it