I Don't Want to be Alone

Lots of people say Flowey is evil but I think that's because of an impact what Chara did. After Asrial lost all emotions and feeling when he became a flower, he adopted kill or be kill. I think the only he did that is because Chara hates everything. It only came to that ideal when Flowey tried everything, even with the power of reset. The only reason he interfere with the happy ending is because he doesn't want Frisk to leave. Believing that Frisk was Chara, he even went as far to kill his father for the human souls. Acting as a bad guy, he knew Frisk has the power of reset every time he died. Even at the true ending he's afraid of being alone again.

Russia could go well as Flowey. His country has suffered enough in the past and most of everyone is afraid of him. He too was afraid of being alone when the Soviet Union fell.  

Russia by Roco
Flowey by
Battle Screen Effect by

Effects: SSAO lite, Diffusion7, Undertale Battle Screen