Goku in Equestria

The room was silent. Well, silent if not for Goku shoveling food down his throat at a speed that even Pinkie had trouble keeping up with. A stack of dishes next to him piled as high as Princess Cadences' head as she approached, "Don't you think you're going a little overboard, Goku? You'll end up with a stomach ache at this rate."

Goku paused his eating, "Nah, I'll be fine. It's not like -" Another pie gone, "- I've never eaten this much before!" a basket full of apples gone in an instant, "Thanks for this, Granny Smith! It's really good!" he continued eating with a colossal grin on his face.

"Aw shucks!" Granny Smith bashfully waved a hoof at Goku, "Been quite some time since somepony's enjoyed mah cookin' this much, Ah'll tell ya!"

"He could at least take smaller bites! Such manners! And in the presence of not one princess, but three!"

"Now now, Rarity. Why don't we let him enjoy himself, he'll need his strength if he's going to fight in the upcoming tournament."

"Yes, he will need as much of it as he can get when he faces our night guard!"

"Hey, can anypony enter this tournament?" asked Rainbow Dash, before noticing the odd looks she was getting, "What? It'll be a great chance to impress the Wonderbolts! And besides, I'm a black belt in karate! I won't go down easy!" she pounded the air for emphasis.

"So will this tournament be like the Tenchaichi Budokai?" asked Goku, lying back with his hands over his stomach.

"Tenchaichi Budokai? We have never heard of such a competition."

"Oh, you know. The Tenchaichi Budokai. Strongest under the Heavens martial arts tournament? The Cell Games took after it." Everyone present was giving Goku questioning glances. He sighed, "The Tenchaichi Budokai was held every five years..."

"... And that's when I defeated Piccolo Jr. Everyone just calls him Piccolo now, though." Goku looked around the gathered ponies (and dragon), "What happened? You all look like you've seen a ghost."

"You had a giant hole blown through your shoulder?! But there isn't a hole there now! How is that even- I mean - RAARGH" Twilight stormed off in a huff, Spike reluctantly following.

"Oh yeah! That reminds me!" Goku walked over to Applejack, placing a hand on each hind leg, "I never got around to fixing your legs. Now, hold still..."

"What do ya think you're -" Gokus' hands glowed a soft yellow, the aura absorbing into Applejack. Her body radiated a golden aura for a second, before it diffused.

"And... done! Give that a try, your legs should feel better now." Applejack complied, taking a few tentative steps before galloping around the barn at breakneck speed. Her remaining friends huddled around her, before piling on in a group hug. Goku stood up, hands on hips and a mock grin on his face, "Hey! Don't I get a hug for fixing her legs?"

"'Course ya do, Goku. But not fer the legs, fer Applebloom and the crusaders. Celestia knows what woulda happened if you hadn't shown up when ya did." Applejack jumped slightly as she remembered who was in her presence, "Er, no offense, Princess."

"None taken. Now, Goku, do you object to taking part in our little tournament? I understand if you don't want to face either us or our guard in the ring, but -"

"Sure, I'll take part! When is it?" Goku interrupted, earning a glare from Luna.

Luna turned to her sister, whispering, "Would the guards' sparring grounds be a suitable location, sister?"

Celestia whispered back, "Yes, they will do nicely. Though they have been a little neglected as of late, but that's nothing a little work won't fix."

"Make sure to reinforce the arena, we don't want to trouble the builders too much when we implant Gokus' face into the ground." Luna gave a cocky grin, making crude hoof gestures to demonstrate exactly how deep underground she would stick his head.

"Be gentle, sister. We don't want a repeat of the 'minotaur tree' incident, do we?"

Luna blushed, lowering her eyes, "How were we supposed to know you were joking?"

"What are you two whispering about?" Goku said, suddenly a foot away from the princesses ears. His sudden change in location caused the princesses to jump a couple feet in the air. Goku laughed innocently, "Oops, didn't mean to sneak up on you there!"

"Yes, well..." Celestia gathered her thoughts, "... The tournament will take place at the guards' sparring grounds in Canterlot." she took note of Gokus' confused looks, "That big city up on the mountain. Would a week be sufficient time to prepare o-"

"- Or will you need decades to get up to our level!" Luna interrupted, shoving her face up to Gokus' smiling visage, in an attempt to be intimidating. Her short stature compared to Goku made this impossible, "All you have proven so far is that you can heal. We have a report of your ability to shoot high power magical blasts, but that was most likely overstated. Your power doesn't even match that of a foal! An-" her tirade was cut short as Goku gathered a small, light blue energy ball in one hand, "... Point taken. But that still doesn't match up to Twilights' power, let alone ours!"

Goku laughed happily, walking slowly up to the moon princess, "A week will do just fine. Heck, I'm ready right now!"

"I'll be the judge of that!" shouted Luna, before a white wing unfurled in front of her.

"Control your power, sister. You don't want to destroy Applejacks' farm, do you?" the country mare gave a gasp at Celestias' words.

"... No, sister. We will save it for the ring." Lunas' ears were turned back.

Pinkie, who was unusually silent through the whole of dinner, decided now would be a good time to get that hug she missed earlier. She crouched down, crawling slowly up behind Goku, drawing closer. Closer...

"Gotcha! Woah!" Pinkie jumped straight through Gokus' after image, with her forelegs stretched out as wide as possible. He shot behind her and patted her on her head as she pouted, covered in dirt. He laughed innocently.

"Gonna have to try harder than that!" Goku ruffled her mane a little more, as Pinkie picked herself up and gave him a challenging smirk.

"Oh I will, Mister! You can count on it!"

"Hey Rainbow? Did y'all see Pinkie fly straight through Goku just now?" Applejack whispered to Rainbow Dash.

"Yeah, you mean I didn't imagine it? Great! I thought I was going crazy for a second there!" Rainbow whispered back, "Do you know how he did that? If I could make more of me in my tricks..." she trailed off, rubbing her chin with her hoof.

"Hey! You should go to Sugarcube Corner tomorrow at five! I think you'll find it suprisingly fun!" Pinkie jumped up to Gokus face, hovering there just long enough to rattle off her request, before dropping back down with her trademark grin on her face.