Platypus

Do you know disney's Phineas and Ferb - my kids (and husband) looove it, especially Perry the Platypus :) 

This listing is for two separate PDF files, one containing instructions on how to do platypus, the other one for agent. Parts for both of them are more or less the same (except the hat) but sewing directions are totally different :)
Platypus, when finished is 22 cm long (8.6 inches) , 32 cm (12.6 inches) with the tail.
Agent P, when finished is 25 cm tall (9.8 inches). 

https://www.etsy.com/listing/640936384/crochet-pattern-no-1813-platypus-and?ref=listing_published_alert

And my favorite photo : 

TOP 5 Halloween patterns

Here is the list of the TOP 5 Halloween patterns by Krawka:

5. Bouquet of man eating plants

4. The hand

3. Alien

2. Frankie the zombie bear

.... and this year's popularity winner is....

1. Nightmare the creepy snake

and don't forget about free creepy donuts pattern on my blog:

DONUTS DONUTS DONUTS

Thing the Hand - Halloween pattern

The hand when finished is 30 cm (11.8 inches) long – from the longest finger to the end of the bone. It’s the size of adult male hand (my husband was my hand model here :)) I put wires in it - that way I can set it in a few different positions (I wanted it to stand on our Halloween table as a decoration), but if you are making it for a small kid, you should skip wiring or use safer pipe cleaners instead.

You can buy the pattern in my etsy shop:  HERE