Is there a chengyu to describe small-time thieves or scoundrels with a playful connotation? I'm looking for a chengyu or an idiom to colloquially describe small-time criminals, but without excessive negative connotation.
There are already words both in Chinese and English that come close:

坏蛋 scoundrel
贱人 cheap skate (colloquially)

But what I'm really thinking of when I say this is the Beagle Boys.

The Beagle Boys are criminals, but they are naive and unlucky to the point of being cute. So even when you see the Beagle Boys pulling off a robbery and splitting the take, the reaction they elicit in the reader is more of pity and ridicule, than awe and dread.
So in English, when I say: &quot;You guys look like the Beagle Boys!&quot; it's easy to take this as a joke — provided my interlocutor is familiar with Scrooge McDuck comics —, as the Beagle Boys are funny, before being obnoxious.
Now, I suspect that in Chinese I can't say: &quot;你们啊，你们跟庀兄弟一样贱&quot; to a similar effect...
I already know 狐朋狗友, but it's not really a playful description.
Is there an equivalent popular character, or some other chengyu or idiom to describe petty thieves and scumbags with a playful connotation?
鼠窃狗偷 (small-time thieves):
Remember the YouTube video that showed a rat pulling a pizza? That's cute; If you have a dog, does he steal your food when you are not looking? Mine did. And it was cute
毛贼 (small thieves):
A thief as small-time as a hair, how much damage can it cause?
笨贼 (dumb thieves/ dumb criminals):
There are many hilarious stories of dumb criminals doing stupid things during the crime. It fits The Beagle Boys' image
If you google '笨贼个案' or 'cases of dumb criminals', you will find a lot of examples
笨贼 is doubly funny for me because it sounds like &quot;stupid dicks&quot; in Cantonese