User blog comment:Albertosu/Rate of third zombie form./@comment-26131865-20150706175236

You need to beat the second stage (hard+) to unlock his third form.

Otherwise it's about 5% of chance for the first one, so you won't obtain him within two days...

(Or else it's 100% if you use a treasure radar, but it's not recommended here, save them for Ururun or useful true forms)