Kretin

The Molecule Bros. are two molecules named Alpha Kretin and Beta Kretin who, in Mario & Luigi: Bowser's Inside Story, kidnap Princess Peach. After a long chase in the Flab Zone, Mario & Luigi finally reached the molecule Bros.. Using the spin move, Mario & Luigi free Peach from the grips of them, but immediately gets attacked by the Molecule Bros. In battle, Alpha Kretin & Beta Kretin will be in three colors: red (which Mario can only attack, green (which Luigi can only attack), and blue (which means it has taken too much damage). After all the six parts of the Molecule Bros. are destroyed, it will fall apart and become a single Molecule Bro.