I'm pretty sure the items stay, however they will no longer have a use option and the only way to get rid of them is to sell them via your inventory for almost no gold. It's always advised to use/sell your candy and coins before the festival ends.

I am not sure about the mojo collectors. Again to be safe it's advised to sell/use them before the festival ends. I doubt the previous year's mojos were usable this year. You'd have to ask someone who actually participated.

To find any kind of pets either use advanced search or make a thread in Pet Auctions. I don't know of a specific CC Ryori thread.

Engineer's items are avatar items you wear. They are available in the haunted house.

I'm sorry if this was too late. It's best to ping me or another person so that we see the post. :)

The halloween pets can be obtained in:

1) The festival zone.

2) The haunted house (very rare).

3) Placing in the top 20 in the mojo contests.

4) Placing in the top 4 in the enemies defeated and nurture contests.

You can also buy them from other players.

The Halloween ones seem to be much more rare. I've only seen them as hatchlings when nurturing them. They aren't listed in the themed pets for this years fall festival. Are they something else?

@FForFox,
Thanks! ^_^ No, it's not too late. :D I appreciate you letting me know what you know. ^D^

I'm sorry, I misunderstood what you meant. I didn't realize you meant the theme.

Halloween pets are obtained by defeating the headless horseman, that's the only way (besides buying one from a player). So sorry about that!

To update, tonight I read that mojo collectors can be used from previous years. Assuming there will be mojo contests next year, you could theoretically keep your mojos from this year and use them next year. However if there are no more mojo contests then the collectors will not have a use. Being able to re-use the collectors could also be changed, it's impossible to know if Krin will allow you to use a previous year's collectors.

@FForFox,
:o Oh, I see! :D Good to know, thanks! ^D^

Thanks for the info. I don't even know where to turn pumpkins in so I think I won't be getting any of those. It kinda stinks because so far they are my favorite theme

You do not need to turn in pumpkins to defeat the headless horseman. The headless horseman is located at the bottom of the map in the graveyard. :)