One day, it was Halloween in Beanotown and Dennis was scaring the Softies with his scary mask, suddenly a portal to Karakura town appeared and Dennis went through it and Ichigo was there and he saw Dennis' mask and said,
"Hollow! Bankai! Tensa Zangetsu!"
Then Dennis said,"Go! Menasudoragon!
Dennis the Menace transformed into the Legendary Menace dragon and killed Ichigo!
Suddenly, Ichigo, by the power of protagonist, came back to life!
They had an epic battle, it was so epic that I can't describe with words, so I won't. After the battle, Dennis and Ichigo became allies and went to fight Aizen.
Fin.