Then I guess not 'everyone' knows how many types of bombs there are. =P

But to answer your question, no, they're not necessary to beat the game. It's just there to be a cool little thing to play with, I guess. It does have a use though, it crawls toward the nearest enemy and 'splodes them.

Maybe they just thought since you get 3 bomb bags, they should give you three different types of bombs so you can have one in each. Or maybe it was the other way around, I dunno.

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