"You have found me, my wonderful Nephew." The eyes of red glowing in the dark, the smell of sulfur and the heat of flames kissed Rob's feet as he walked down the path.
"Uncle. You are not allowed on this planet. You are an ill force, and these organic ponies will wither if you continue your plight."
"Strong words, did your -father- teach you those?"
"My father is twice the stallion you will ever be. It's a weak man that kills a mare!" The ground around Robert began to crumble, and he jumped to a platform not far away, as the ground crumbled into lava below.
"You're father is dumb... weak and pathetic. He sat by and allowed me to do what I did."
Rob stamped his hoof, "You forgot to kill my sister and I. Gwen still lives on in our cores. She is still with us."
"I intend to kill you now, you silly colt. Then perhaps I'll go after that scrap of bolts you call a Princess." The figure before him came out of the smoke, and there stood his uncle. "Or maybe I will force her to spark-bond with me..."
"YOU LEAVE HER OUT OF THIS!" Roberts energy surged, his eyes turning a glowing deep violet as he lowered his head. "You do not get to harm my Princess. Fight -me- like a stallion, or are you too cowardly?"
The fireball singed the rainbow tail of the metal pony, and he turned and snorted, "That's all you've got?" His core began to glow.
"I am a pony of love and tolerance. But to those that cannot love or tolerate, I have only pity for them. I pity you Uncle, for you hide yourself away..."
Another fireball, and this time it hit Rob directly, causing him to stagger back, but he did not waiver, his horn began to glow, slowly fading through the colors of the rainbow.
There were no more words, instead, only a savage nicker from his uncle, who reared up in a sinister display, huge firey wings spanned behind him as he charged his nephew.
"This planet has taught me about love... tolerance of everypony, and most importantly -friendship-."
He did not dodge as his uncle slammed into him, and the explosion of rainbow in a sphere rattled the nearby trees, waking animals and sending birds flying.
The aftermath was silence. Scrap metal lay scattered around, the dirty tarnished silver of Lord Galaxtron lay in clumps.
"Forgive me Uncle... I am not a ponybot of war... but you threaten my Princess and I am designed to protect her." The body core was mostly intact, as was the head. Using his horn, Rob knelt down, and opened the chest, pulling out the core; his 'heartbeat' as it were. Then he picked up his uncle's head by the firey mane and trotted out.
"What is this? A gift... but it is on your wedding day son!" King Galaxtron had no clue his boy had found his uncle, let alone eliminated it. Now before the King sat a box a bit bigger than a breadbox.
The King opened it and inside sat the head of his uncle, and around his horn was Gwenevere's wedding ring.
"M... oh my word... H... how!?" He was beyond words.
"Father, there is one other thing." He smiled as he fixed his suit in the mirror. "After I marry my sweet Princess, I am stepping down and allowing StarBurst to take my place for the throne. She will be the Queen our people need."
His father's eyes welled up with tears. "What about you?"
"My bride wishes to stay here, and her wish will always be my command."