I believe you are talking about the banner pups. You get them rarely from the candy hunt banner : )
As for the boxes...
First box from the bottom
=

Snake tailed foxes
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Second box from the bottom [not including lucky dip item boxes]
=

Radioactive butterfly wolves
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Third box from the bottom [not including lucky dip item boxes]
=

Cthulhu cats
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Fourth box from the bottom [not including lucky dip item boxes]
=
I don't know yet

You can see all of the Halloween outcomes
hereHope this helps : )