–Susan Sto Helit, Hogfather.

@Liggliluff  
The creature in fact was more concerned about using unnecesary force against the princesses.
 
If that thing really needed the flower, it would has been far more concerned about that instead the alicorn duo.

@Twi_Clown  
They are princesses, not the police. But I’m not sure how their royal/parliament system works. … And how can you own a flower illegally?
 
The princesses were going to take it for personal use, not to confiscate it. So that would make it theft.
 
I did forget omnivore. Could be an omnivore.

@Liggliluff  
1.- Again, maybe he owned the flower without license, and both of them are princesses. Thus, they can take it away.  
2.- You forgot omnivore. Maybe that thing eats both plants and animals.

@Twi_Clown  
According to Discord: “at the very edge of Equestria”, so that should still be in Equestria; as it should refer to right before exiting Equestria, from the perspective from Equestria itself.
 
Now, we need to determine if it’s a carnivore or a herbivore. Consider its aggressiveness, I would guess carnivore. — But it doesn’t change the fact that the princesses were the first jerks in this interaction by picking the flower. … What if someone just came by and picked Applejack’s big Apple? That would make her furious too.

@Liggliluff  
The last one was a good point.
 
Where were those three nutcases again?

@Twi_Clown  
I’m sure the latter two aren’t illegal in Equestria; and is this creature even in Equestria?

@Liggliluff  
I still think that thing may have done something evil before.
 
Like stealing cookies, jaywalking, or even owning a giant flower without license.

@Twi_Clown  
An assumption might not be wrong, but it still has no proof, and shouldn’t be taken for granted. — It should obviously not be ignored either until disproven.
 
However, a positive claim (such as someone has done something) should be proven, and not disproven. It’s hard to prove that someone haven’t done something.

@Liggliluff  
An assumption that may have valid arguments……I can’t think in one right now, but it may be.

@Twi_Clown  
But that’s just an assumption

He may has done evil deeds before.

I could see people interpreting this as the Tatzlwurm being the bad one. But I don’t. The ponies provoked it by ruining it’s territory, it had the right to defend itself.