- This article is about the Mother 3 enemy. For the similarly-named Arachnid enemies, see Arachnid! or Arachnid!!!.
- "It has an incredible three, no, four exclamation marks in its name. That's just the kind of spider it is."
- — Battle Memory
Arachnid!!!! is a stronger, poisonous blue-and-purple counterpart of the Arachnid! encountered in Osohe Castle. It is quite fast and aggressive in the overworld, and often appears near Elder Batties and Greedier Mice.
The Arachnid!!!! uses webbing to solidify targets, and can deal moderate damage with its bites, which may also poison the target. Keeping antidotes on hand should mitigate this status problem. Once defeated, it also drops an Antidote.
Its battle sound is Battle Sound 27 which falls under Code Numbers 517 for regular attack, 518 for Smaaaash! and 519 for Miss.