Um, what does "end" mean?
Not much of a misunderstanding, it's just Sonic, Flash and the rest of ninjavillage folks are so haughty, that it doesn't matter how much more powerful opponent they face, they'll never admit admit defeat and submit to inferiority. I assume, it had been grinded into them since the very birth. With all that arduous training, you know. That's why Flash had to clean his entire class, for they never give up and never back down till the very bitter end.