Dr.Zombike is one of the antagonist of series!..When Dr.zomboss was dead,his soul come to mike's body!..Making him Doctor.Mike Zomboss

After his defeat,that someone (certainly unknown} kissed him...causes his defeat,Dr.Zomboss's soul was taken away!..and making normal mike one!....and Dr.Zomboss made his return debut!...It's really unclear if Dr.Zomboss returns to mike's body to destroy him or not!....