We finally found who the zombies are.
Search for "mochi-mochi" in there and you get a text line/file with an NPC saying "Mochi-mochi!" ...And that NPC is labelled a zombie.
Turns out that every zombie in the Indigo Disk is a metaphorical, living one. ...Who's stuck dancing to the beat of Pecharunt's drum.
Yknow when we first got the datamine news about the "zombies" with no further details I was envisioning a really creepy and bizarre secret boss fight in a hypothetical XY2 against an undead Lysandre resurrected by what we now know as Pecharunt complete with Toxic Chains replacing his backpack wire things
That idea has become a great deal sillier now that we know what's actually involved