Carl's permanent Strength-100 upgrade doubles every Strength point assigned through future level-ups.
Reaching base Strength 100 gives Carl three timed choices. Prison Bitch would add twenty-percent hand-to-hand Strength against weaker foes, while Stepson would give foot attacks a fifteen-percent chance to inflict the staggering Ouch effect.
Mordecai and Katia recommend Swole for long-term growth. Carl chooses it despite Donut's preference for the foot option, causing all future level-up stat points assigned to Strength to grant two points instead of one.
A permanent system upgrade accompanied by visible swelling of Carl's arms and chest.
Swole commits Carl to superior long-term Strength scaling beyond the hundred-point milestone.