The Bowling Bombs is Shelly's explosive of choice. Naturally it can be augmented to suit your particular play style.
H.D.A. - Self-directing bomblets with an alpha-wave detector system.
Hivebomb - Bomblets with multiple delayed-fuze systems.
Pin-Bomb - Allows the primary Bowling Bomb to spawn an additional Bowling Bomb on detonation, and again on the following detonation.
Steam Wishlist --> http://bit.ly/BombshellSteam