From Cuphead Wiki
There are a few unique Weapons (or shot types) in Cuphead which can seriously change the way you play through each world. There are a total of six weapons, five of which can be purchased from Porkrind's Emporium for 4 Coins each.
|Peashooter||Standard long-range attack. Acquired by default.|
|Chaser||Homing attack. Does below average damage. Bought at Porkrind's Emporium.|
|Spread||Short-range area-of-effect attack. Does more damage if all bullets connect. Bought at Porkrind's Emporium.|
|Roundabout||Boomerang attack. Bought at Porkrind's Emporium.|
|Lobber||Volley attack. Bullets bounce along the ground. Bought at Porkrind's Emporium.|
|Charge||Single-bullet attack. Holding down attack button increases bullet damage. Bought at Porkrind's Emporium.|