New update data for Pokémon Bank recently became available on Nintendo 3DS. Update version 1.4 requires 516 blocks and implements compatibility with Pokémon Ultra Sun and Ultra Moon. All Pokémon from the latest duo of Pokémon games can be added to Pokémon Bank, except for the huge totem-like Pokémon and Necrozma’s forms.
Totem Pokémon and Necrozma’s forms can’t be added to Pokémon Bank from Pokémon Ultra Sun and Ultra Moon
Pokémon Blog 
That would explain why the araquanid totem cant go in, but I can definitely put in the totem raticate. I just tried and it goes in just fine. Went into a battle to make sure it was the right pokemon and sure enough, it was the totem raticate for sure. Did they make some exceptions?
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I was able to put in all totem pokemon including araquanid, Lurantis and Togedemaru but my marowak cannot be deposited. Even the Poipole went in fine and Necrozma too but don’t understand why my Marowak will not?? Any ideas……
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