Howdy! I'm Flowey! Flowey the Flower! 
Hm.. You're new to UNDERGROUND, aren'tcha? Golly, you must be so confused. Someone ought to teach you how this work around here! 

____

Clever. Veryy clever. You think, you really smarrt, don't you? 
In this world it's kill or be killed.  
So you were able to play [bad word] 
You spared the life of a single person. 
I bet you feel really great.

_____
You IDIOT
You haven't learning a thing. In this world... 
IT'S KILL OR BE KILLED
Howdy! It's me, Flowey! Flowey the Flower! 
I owe to a HUGE thanks