Does anyone know invincibility cheat for game pipi and bibis?

Usually, arcade games don't have invincibility cheats, they are designed to let the owner make money, with an invincibility setting, a player could play hours with just one coin

Try with mame to use Pugsy's memory cheats who change the value of the player life in memory, or maybe in the "dip switch" settings of the game (for example some neo geo games had cheats in dip switch - an operator could decide to set it)