Answer:
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
I have memories but none of my own whatever's on my inside is what is shown. If I'm ever different it's because you changed me I feel like a decoration here for you to arrange me.
Everyone has me, but nobody can lose me. What am I?
I am the kind of fish that chases a mouse.
Forward I am heavy backward I am not. What am I?
What made Cyclops quit teaching?