As I predicted a few days ago, the event for November is indeed an updated King's Giveaway! What you need to know about this "event" is that the prize mice that already existed in the game are on the loose again in much greater numbers. This means you have a much better shot of catching them! As of this writing, I have already managed to snag a Snooty Mouse. Some of the mice are carrying actual cash prizes! Below is all the information for the event! Have fun hunters!
King's Giveaway
It's giveaway time in Gnawnia! An increased number of prize mice
are roaming the entire Kingdom carrying with them prizes of King's
Credits, SUPER|brie+, real cash, and more! The giveaway will last for
one week with over $25,000 in prizes to be won! Arm your traps and get
hunting!
Prize Mice
Treasurer Mouse
(common)
Compared
to other prize mice, Treasurers are somewhat common during a giveaway.
Found wandering the Kingdom, they carefully catalog and count the King's
Credits that "higher-ups" have managed to hoard. Capture one and you'll
find a few King's Credits for yourself!
Snooty Mouse
(uncommon)
Snooty
mice enjoy the finer things in life, trading their stockpiles of King's
Credits for gourmet cheese and fine clothing. These mice can be
difficult to find, but with their capture comes a small handful King's
Credits!
High Roller Mouse
(rare)
These
mice hustle massive quantities of King's Credits from other mice using
their keen instincts and straight poker face. High Roller mice carry
with them a large quantity of King's Credits, however, they're also
quite rare. You'll need lady luck on your side to even encounter this
mouse, let alone capture it!
Mobster Mouse
(very rare)
Mobster
mice don't like a lot of competition from other mice on their turf, and
as such, encounters with a Mobster can be few and far between.
Capturing a Mobster Mouse will earn you what they call "the good stuff",
although it's more frequently referred to as SUPER|brie+ by hunters.
Leprechaun Mouse
(extremely rare — only a few hundred in the entire Kingdom!)
Leprechauns
are the source of many fictional stories throughout the Kingdom, which
seems suiting as, along with their rarity, many hunters believe these
mice to be fiction! Leprechauns are the rarest mouse in the Kingdom with
only a few hundred out there to be found. Will luck be on your side and
will you find the rarest of all rare mice in your trap?
Regal Journal Theme and Charms!

This
most opulent Regal Journal Theme is comprised of two halves. The first
half is dropped by Treasurer, Snooty, and High Roller mice; the second
half can be purchased from the King's Arms for 15 King's Credits and
10,000 gold. Show off your prize-hunting prowess with regal style!

Regal
Charms are handcrafted in Gnawnia from only the finest materials,
making them only available in short supply. These extremely powerful
charms have 1,000 power, 6 luck, and 20% attraction bonus! Regal Charms
can only be found while the Giveaway is active inside Daily Loyalty
chests, daily gifts, and in the
Regal Gift Basket. Once the Giveaway is over, these charms will no longer be available, so make sure to share as many as you can with friends!
Regal Gift Basket

Packed
to the brim with Regal Charms and SUPER|brie+! The Regal Gift basket is
perfect for feeling fancy and hunting like a King! Perfect to give to a
friend who needs a little lavishness in their life!
Updated King's Arms Items
Put your King's Credits to good use by spending them at the
King's Arms
located in the Valour region. There you'll find a wide variety of loot
to help you in your hunting endeavours. The King has stocked new items,
like the Sheriff's Badge Charm, so make sure to visit and check out the
wares!
Where can I encounter a prize mouse?
Prize mice can be found anywhere other than the Meadow. However, keep in
mind that not all bait will attract a prize mouse. See the list below
of bait capable of attracting a prize mouse.
What happens when I catch a prize mouse?
Journal entries for prize mouse catches are bright green, making them
hard to miss! In addition to a journal entry, you'll also receive a
notification in your inbox letting you know which mouse you caught and
what prize it was carrying.
If a prize mouse was carrying King's Credits, SUPER|brie+, or other
items, the items are added directly to your inventory. Should you
capture a mouse carrying a real cash prize, you'll receive a second
journal containing a link to claim your prize.
Prize mice are on the loose!
Hunt almost anywhere for prize mice
Over $25,000 in prizes!
More than 500,000 pieces of SUPER|brie+ to win!
Collect King's Credits to spend at the King's Arms
Collect the Regal Journal Theme
Good luck in the giveaway, hunters!