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Tier 0: UR RatThis rat has been OMGSR since 2011 and never returned to VR.
It is worth significantly more than any other rat.UR Rat
Same rarity as: UR Tiger, UR Mint Horse
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Tier 1: High OMGSR RatsThese rats fluctuated between VR and OMGSR from 2011 - 2014.
The 2019 Rarity Update firmly set them as OMGSRs and they are unlikely to drop rarity.Light Speckled Rat
Medium Speckled Rat
Heavy Speckled Rat
Dark Heart Rat
Same rarity as: Nontag, UR Butterbun
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Tier 2: Mid OMGSR RatsThese rats were mostly VR until the 2019 Rarity Update.
They have been OMGSR since then.Light Pawprint Rat
Dark Pawprint Rat
Flower/Toxic Rat
Lime Ice Rat
Light Heart Rat
Same rarity as: Noncoon, Grown White July (GWJ), UR Ice Cat
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Tier 3: OMGSR/VR RatsThese rats were mostly VR until the 2019 Rarity Update.
They have been fluctuating between OMGSR and VR since then.Black Skull Rat
Natural Blue/Grey Rat
Same rarity as: Pink Sorbet
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Tier 4: Eternal VR RatsThese rat has always been VR, ever since rarity tags were introduced.
That makes it very difficult to determine their rarity.
It is unclear why they are more common or rare than their littermates.Tier 4.1 (Released July 08)Blue Ice Rat
Same rarity as: Toxic & Tribal dog litters
Tier 4.2 (Released Dec 08)Elf Rat
Same rarity as: Sock Dog
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Tier 5: High VRThese rats turned VR in Late 2010.
This tier is broken into sub-tiers based on what month they turned VR.
The gaps between sub-tiers is small.Tier 5.1 (VR in July 2010)Rose Rat
Jack-O-Lantern Rat
Pink Panda Rat
Same rarity as: Halloween 08 Cat, Purple Grinner, Pink Heart Bunny, Growing Batwing Blood Dog
Tier 5.2 (VR in Aug/Sept 2010)Pumpkin Rat
Orange Panda Rat
Same rarity as: Purple Batdog, Red X dog, Angel Advent, Stripey Pink September,
Tinsel Tess Horse, PPS Dice Pony, Green Zombie Pony
Tier 5.3 (VR in Nov/Dec 2010) Blue Panda Rat
Brown Advent Rat
Brown Hooded Advent Rat
Black Hooded Advent Rat
Tan Hooded Advent Rat
Blue Hooded Advent Rat
Blue Speckled Advent Rat
Dark Brown Speckled Advent Rat
Same rarity as: Blue Rose Dog, Red Zombie Pony, Roadkill PPS Pony
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Tier 6: High/Mid VRThese rats turned VR in Early 2011.
This tier is broken into sub-tiers based on what month they turned VR.
The gaps between sub-tiers is small.Tier 6.1 (VR in Jan 2011)Light Grey Advent Rat
Tan Striped Advent Rat
Pale Beige Advent Rat
Tan Bellied White Advent Rat
White Bellied Tan Advent Rat
Raccoon Advent Rat
Tan Advent Rat
White Advent Rat
Brown Cow Advent Rat
Same rarity as: KISS PPS, Growing Light-Faced October dog, Snowflake BFW, White Bunny
Tier 6.2 (VR in Mar-May 2011)Skeleton Rat
Santa Rat
Rudolph Rat
Cheetah Rat
Tiger Rat
Panther Rat
Same rarity as: Growing Dark-Faced October, Watermelon Dog, most Advent 08 dogs
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Tier 7: Mid VRThese rats turned VR in Late 2011.
This tier is broken into sub-tiers based on what month they turned VR.
The gaps between sub-tiers is small.Tier 7.1 (VR in Aug 2011)White St Patty's 09 Rat
Dark Brown Patchy 08 Rat
Same rarity as: Target Dog, Hollyfox Dog, Hollyfox Cat, Tinsel & Snowflake Advent Lions, Cocoon PPS
Tier 7.2 (VR in Oct - Dec 2011)09 Valentine's Light Heart Rat
09 Valentine's Brown Heart Rat
09 Valentine's White Heart Rat
Light Black Spotted Rat
Orca Rat
Same rarity as: St Patty's Day Dog, Nick Nonjewel Horse, Pumpkin BFW, Green-nose Rainbow Spot dog,
Candycane Tess Horse, Pink & Green April Fools Cats, Cream Gears Bunny, Blue Aussie Bunny, Spider BFW
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