Beelzebub, in base game, did not have a script where he'd cast Dekaja and Dekunda at preset times. The script in Hardtype is unaltered, I was wrong. I also included his usage of Mazandyne which I neglected to include while describing how I cheesed him.
I had DUPLICATED the normal patch inside the EXTRA folder by mistake, instead putting there the additional patch. With this update that is fixed.
Now the normal patch and the optional patch inside EXTRA folder are different; the second does really replace the enemy names by the Spanish names used in modern translations of Dragon Quest series.
It has been an human mistake.