Chakron is the third Star Sage, the guardian of the third and final Star Cure and the owner of the Chakroads in Mario & Luigi: Bowser's Inside Story. He resides atop a cliff in Plack Beach, where he has motionlessly meditated for a thousand years.
When Bowser first discovers the Chakroads, Chakron (who is albeit unseen) explains them to Bowser and grants him use of them. Later on in the game, when Mario and Luigi are searching for the Star Cures in order to stop Fawful, they find Chakron atop his mountain. He explains that he has frozen in his meditative pose for a thousand years, gathering knowledge from the stars. He offers them the third Star Cure if they can use an attack that would shake the ground and break his pose. During his explanation, Luigi humorously tries to imitate his pose, but falls over. He then tries to tickle Chakron, much to his annoyance.
At first, Mario and Luigi battle him. After three turns, Chakron sighs and disappointingly ends the match. He tells the Bros. that there is an attack in "the wood" that will free him of his pose. Mario and Luigi then collect Attack Pieces in Dimble Wood, learn Snack Basket and use it in a rematch against Chakron. When an Excellent is achieved using the attack, Chakron falls over.
Outside the battle, his statues fall and he voices his displeasure at being knocked onto his back, and rather than relinquishing the Star Cure, he crawls over to the edge of his platform and falls off the cliff. The Bros. and Starlow are surprised and horrified, but Chakron then drops down from the sky unharmed, and assumes a new hand-stand position for meditating. Satisfied with the change, he gives the Mario bros. the last Star Cure and offers to teleport the brothers back to Toad Town. Any time the bros. visit him from that point onward, he will offer them the same instant transport to Toad Town, which presumably works the same way as the Chakroads, although the action is taken off-screen at the secretive Chakron's behest.
Chakron's last appearance is at the ending of the game. After Peach's cake is shown, Chakron reveals in a voice-over that he monitored the player's progress and tells them their Ranks, either suggesting the player tries harder next time or congratulating them on getting the highest ranks.
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