Sloth
The Sloth is a hidden 
Tier 1 Pet that can be found in Any pack. On each roll, including the start of turn shop refresh, it has a 1/10,000 (0.01%) chance[1] of appearing in the left-most unfrozen space in the pet shop. Sloth also has the chance to replace the 
Golden Retriever when it's summoned.
Gameplay-wise, the Sloth has no abilities. But the game states he believes in you.
Strategy
Sloth is the ultimate bragging right. Not only because of its incredibly rare chance to show up, but also due to having the lowest base stats in the game and no abilities, should you choose to buy it, it will be an immense burden on your team. Winning with a Sloth often means winning with 4 usable slots on the team, and winning with a level 3 Sloth means you're capable of winning with any pet in the game. The Sloth ribbon is the definite proof of your prowess in Super Auto Pets.
It will always show up when you least expect it, and oftentimes on runs that cannot afford to bring along a deadweight. Since the chance of finding more Sloths on the same run is vanishingly small, in order to level it up, you'll have to rely on other methods such as hunting for 
Chocolate, 
Crow, etc. Remember that it has no abilities, so any experiences spent on the Sloth would've been much better off given to another pet.
Regular Ribbon Strategy
In regular runs where he comes, there is still hope, so don't worry. For the Sloth Ribbon, we want two accomplishments: to win 10 times, and to have a level 3 sloth. Each accomplishment is hard enough already, but the combination of accomplishing both makes this achievement nigh impossible. Sloths want three things in life: time (they're slow), chocolates (they're addicted), and POWER (from other pets, of course).
The problem of Time: imagine that you have a godly start to your run, and by end of turn 4, you have 4/10 trophies and well on your way to a FLAWLESS victory. Then you see a Sloth on turn 9 when chocolates start showing up, and your arena run is about to end already. How do we solve this? Intentionally lose in turns 1-4, the target is to have 7 lives. Try to draw as much as you can rounds 1-10 so you can target finishing your arena run at rounds 14-16.
The problem of Chocolates: imagine that you have a crazy food build going and you're eating Pizza left and right, your team is STACKED. Then at 8 trophies, you realize your Sloth is only level one and you need to spend 15 of your remaining 20 gold on chocolates. No problem right? WRONG. The probability of finding 5 chocolates to eat with 20 gold remaining is actually around 0.1%, that is only 1 in 1000 chance! You need to plan your run, on average you need to spend 10 gold to roll and buy a chocolate.
The problem of POWER: Not only is the sloth the weakest unit in the game gameplay-wise and takes up a slot on your team, his chocolate addiction also drains resources from others. You can have a crazy food build with Cats, Seals, and Squirrels, but you may not be able to buy food because the Sloth needs his Chocolate. That is why passive scaling (Penguin, Monkey, Bison, etc.) is recommended. On 7/10 trophies and rolling for chocolates, you need your team to get continually stronger without spending effort to do so. There is a world where food scaling is possible (when all the cats fall in your lap), but its not an easy path.
Ultimately, if you can balance all three of these, you will find yourself with the best chance of the sloth ribbon! Keyword though: chance. You can do everything right but get unlucky and never see enough Chocolates. Just have fun and try not to stress out too much about it. Some things are just not meant to be.
Anglerfish
The easiest way to get a Sloth is simply let others find it for you. Then, through 
Anglerfish's ability, we can steal it from them. Though that is rare in Arena most of the time.
If you're matched against a Sloth team while having one or more Anglerfishes frozen in the shop, buying them will grant at minimum a 40% chance of getting the Sloth, which is a substantial increase from 0.01%. All we need is for one person to carry a Sloth till turn 9 or further, then others will be able to copy that Sloth for themselves and the Sloth economy will inflate. Sharing is caring!
Game Sound
Hall of Fame
The current record for most high leveled Sloths, winning Arena run is 4 level 3 Sloths, achieved in Custom pack by a group of Chinese players on February 5th, 2023: https://youtu.be/0B-cWnmwR3M
Trivia
- The Sloth's achievement and ribbon are hidden, similarly to most Tokens.
- The Sloth is the only rarely seen animal added to Super Auto Pets as of the induction of Puppy pack.
Gallery
The standard sprite of the Sloth
The classic sprite of the Sloth
The record as of Feb 5, 2023
History
- 0.27:
- Sloth's spawn position is changed from "Right-most pet shop space" to "Left-most unfrozen pet shop space".
