champion with the gem destroyed an entire planet with a single punch, thor with the gem could beat SBP quite easily, and heres the definition of the power gem:
Power Gem (red/pink*) - This gem contains access to all power and energy that ever has or will exist. It backs up the other gems and boosts their effects. With this gem alone, the user can eventually duplicate almost any physical superhuman ability, and is essentially physically invincible and therefore unbeatable when using raw power alone.