- Bat Doctor seems to have had many failures in his brain surgery experiments before he decided to stick rusty spikes into his head.
- Bat Doctor also seems to be the driving force behind Zombie Carnival, where he asks the dead not to sit there like corpses, but to get up and dance.
- Despite it is a Ghost, it has the naming traits of a Living Dead in the OCG. (Using a term and 者 , Mono behind its name.) Its appearance also resembles a Living Dead as well. This is fixed in the TCG where "Shadow of" would be used to identify the creature as a Ghost.
|Bat Doctor, Shadow of Undeath|
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