Baymax's Chip is an object featured in the film Big Hero 6. It was created by Tadashi Hamada in order to make Baymax the nursing robot that he was intended to be. It is a green-colored chip with an icon of a smiling doctor and a sticker with the name of its creator on it.
The chip was temporarily removed by Hiro Hamada—who had earlier inserted a red chip consisting of fighting moves—when he ordered Baymax to terminate Yokai. If the green chip is removed and the red chip left inside, Baymax can become aggressive. Luckily, Honey Lemon found the chip and reinserted it back into Baymax, restoring the robot to its peaceful, nursing personality.
While in the portal, Baymax removes the chip before being deactivated by Hiro. Later, Hiro discovers the chip clenched in Baymax's rocket fist while attending the San Fransokyo Institute of Technology, giving him the ability to rebuild Baymax and using the chip to restore his memories and adorable personality.