Ichigo uses his Getsuga Tensho technique, which involves infusing his Zanpakuto, Tensa Zangetsu, with his Reiatsu and releasing a powerful energy blast. Aizen attempts to counter it, but Ichigo's determination and Reiatsu prove to be too strong.
The fight takes place in the Fake Karakura Town, where Aizen has gathered his allies, the Arrancar, and the Espadas. The atmosphere is tense, with Ichigo and his friends ready to face off against Aizen and his minions.
The fight between Ichigo and Aizen begins with Ichigo, in his Bankai form, clashing against Aizen, who has achieved a significantly higher level of power using the Hogyoku. Aizen's Reiatsu is so strong that it causes the surroundings to distort, and Ichigo struggles to keep up with his attacks.
In the end, Ichigo emerges victorious, having successfully defeated Aizen. The Fake Karakura Town begins to return to normal, and Ichigo's friends celebrate his victory.