The correct answer to this open question is the following.
In the game Contra, the "B" capsule will make you invisible for a short time.
There are other capsules such as the “M” one that is for the Machine Gun weapon. It is also known as a heavy machine gun. It is commonly the power-up in most games of the game’s series. It is a fully automatic weapon that shoots faster. You do not need to tape the button in continuous times. You keep the fire button held and it shoots continually. In upgraded versions such as “Contra 4”, is considered the most dangerous and powerful weapon. It shoots two bullets at a time. It is the most devastating weapon of the game.
