Mecha-Bandicoot is a 40-foot mechanical version of Crash Bandicoot in Crash Twinsanity. The robot was first introduced as a boss fight after the battle between Crash and Cortex. It was then shown that N. Gin was controlling it throughout the battle.
It is equipped with a chainsaw, rockets and plasma blasts (that have the same effect as Cortex's gun). After defeating it, it isn't seen again until the final battle between the Evil Twins in the 10th Dimension. Since it isn't seen ever again, its fate is unknown.
Cortex refers to Mecha-Bandicoot as Crash's "new hydraulically operated twin brother" in its boss fight.
It is unknown how Mecha-Bandicoot got to the 10th Dimension; N. Gin may have taken it there in order to get the treasure of the Evil Twins or Cortex had put it in storage in his lab, which Crash went back to get for after the fight. It could have been possible that Crash went back to the mines in his dimension to get it, as of which that could explain why he left before Nina fights the Evil Twins.
When the fight with Mecha-Bandicoot begins, it is shown to be able to jump very high, but when it is playable, it can't jump very high.
It is unknown how Crash learned how to operate Mecha-Bandicoot so quickly.
According to a cut cutscene, Mecha-Bandicoot is equipped with an electric brain. The brain has Crash's cerebral patterns programmed into it, which Aku Aku doubts was wise after Crash started sucking on a light bulb that shocked him.
Mecha-Bandicoot was originally going to be playable in the cut level, Ocean Commotion, but was removed for unknown reasons
In one piece of concept art, it shows Mecha having a drill instead of a chainsaw.