-( Story related, cannot be missed )-
This fight has two phases. The first phase consists mainly of running right or left to start unscrewing its eyestalk to stun it, then activating five power coils. Once you've done this twice, you'll end up getting into the second, more challenging phase. For this, you must beat up the Dark Genies and use them as shots to hit the Tinkerbrain in its core when the defense is down. If you have a fully upgraded attack, only two shots will be required to take down the genies, with a third hit sending the genie energy towards the core. Ten shots are necessary to defeat the boss but you'll have to put up with its rotating shields and the fact that the Dark Genies themselves are protected normally.