One Piece: Starting as a Marine Lieutenant, I Slack Off and Get Stronger

"Armored Iron Body!!!"

Garp unleashed his strongest defensive technique without hesitation, showing no concern about losing his life. This move was invincible to him; he was confident he could withstand the full force of both Whitebeard and Roger. Unfortunately, this time, he miscalculated.

The Iron Block Law is closed again.

bang~

"Pfft~"

Garp, whose entire body was jet black, was sent flying like a tree uprooted by a tornado. He flew for thousands of meters before unsurprisingly falling into the sea.

Seeing this, Luffy couldn't help but reveal a sunny and cheerful boyish smile: "Hehehe, I knew it! I'll knock you away, grandpa!"

The Marines present were also captivated by Luffy's appearance. Although the intelligence reports mentioned the Straw Hat Luffy's awakened form, this was the first time they had seen it.

"What a powerful ability! Even Mr. Garp couldn't stop it."

"After all, he's considered the Pirate King!"

A moment later, a roar echoed through the air, and Garp, soaking wet and with a flushed face, charged into the sky, throwing a punch at Luffy.

Looks like that old bastard Garp is getting anxious.

"Hahaha, I'm not afraid of your grandpa! Come and hit me!"

Duang~Duang~Duang~

Garp's series of iron punches were like hitting putty; they couldn't hurt Luffy at all, even when he added Haki.

"Luffy, you bastard! How dare you insult me! I'm furious!!!"

The more anxious Garp became, the less he could hit Luffy, and the more openings he revealed. Luffy quickly seized the opportunity and sent Garp flying with a single punch.

"This is so much fun, Grandpa! But I don't have time to play with you anymore, I have to go rescue my friends!"

At this moment, Luffy noticed that apart from Sanji, Zoro, and Jinbe, who were still struggling, the others had already disappeared. It was obvious that they had been captured by the Marines.

So, he had to act quickly.

With a whoosh, Luffy soared into the clouds, his powerful shout echoing through the air.

"Rubber Monkey Gun!"

The sky suddenly darkened, and a gigantic black fist, obscuring the sky, pierced through the heavens and headed straight for the island. If no one stopped it, the entire island would likely be reduced to ruins.

Garp, who had just been knocked away by Luffy, got up from the ground, looked up at the sky, showed no fear on his face, and calmly patted the dust off his body.

At this moment, Garp's aura became even more intimidating, with a faint red aura surrounding his muscular body.

Soon, Garp's skin gradually turned dark, leaving only his black and white pupils.

"Ohhhhh!!!"

Bang! With a powerful shockwave, Garp vanished from his spot and charged toward Luffy's Monkey God Spear.

The ground where Garp had just fought was a mess, covered with spider webs and cracks.

Everyone present stopped fighting and stared intently at the impending cataclysmic collision between heaven and earth.

Click~click~

Chapter 365 Naval Hero Relay Race

A sickeningly loud noise filled the air, originating from the clash of fists between the grandfather and grandson.

Despite Luffy's large and intimidating fists, Garp managed to hold his own against him with his own seemingly ordinary iron fists.

"Hiss~ Is Vice Admiral Garp serious?"

"This is the strength of the previous generation of naval heroes!!!"

In the sky, Garp's eyes were bloodshot, veins bulging, enduring immense pressure. Even so, he roared, "Luffy, this time, I won't show any mercy!!!"

Boom~

Garp stomped on the air, using his unparalleled strength to push Luffy's Monkey God Spear upwards step by step with Moonwalk.

Luffy, who was now on higher ground, paused for a moment, then laughed even harder: "This is getting more and more interesting, Grandpa!"

As soon as he finished speaking, a sudden change occurred.

Luffy suddenly pulled back his fist—no, it shouldn't be called pulling back his fist, but rather drawing the energy from his fist back into his body. This allowed Garp to quickly close in on Luffy, but don't forget…

The gas inside Luffy's body has simply moved to a different location; it hasn't disappeared. At this point, Luffy's body has become bloated, but upon closer inspection, one can see that Luffy is like a pressure cooker, accumulating terrifying energy.

Just as Garp was only a hundred meters away from Luffy, Luffy grinned and said, "You've fallen for their trap!"

Garp's expression changed. In his vision, the bloated Luffy suddenly shrank, but his fist grew bigger and bigger. This was... the Gum-Gum Monkey God Spear with a second thrust?

Garp quickly withdrew his fist, preparing to run away, but it was too late.

bang~

Phew~

Karp was hit by the Ape God Spear and fell into the island like a meteor. The moment he hit the ground, he caused an explosion comparable to a small nuclear bomb, which shook the entire island of Dieterre.

The onlookers had to adopt a defensive posture to avoid being affected by the terrifying shockwave.

Garp is in for a lot of trouble now.

Under the shield's protection, Karl scratched his head and muttered to himself, "We're both cheating, but I've been working hard and slacking off for almost ten years to get this kind of strength, while Luffy has only taken two years and is almost catching up to me."

It seems his cheat codes are a bit conservative... No, 90% of the cheat codes in parallel worlds are too conservative, which is Oda's fault! If you're going to use cheat codes, use something powerful; small-scale cheats are useless.

The shockwave raged for nearly three minutes before the situation gradually stabilized.

A huge crater, hundreds of meters in diameter, appeared in the center of the island. Garp, dressed in rags, lay in the center of the crater with his eyes rolled back, a sight that seemed to follow in his footsteps.

"Vice Admiral Garp!" A dove-like admiral in the Navy looked worried. With such a commotion, would Garp be beaten to death by his grandson?

Gion walked up to Karl and gave him a push: "Hey, Karl, what are you standing there for? Aren't you afraid something will happen to Lieutenant General Garp?"

Karl laughed and said, "Don't worry, Gion-neechan, Mr. Karp is tough as nails! It's just a minor wound, nothing serious. My Holy Light energy is not to be trifled with."

Indeed, after Garp fell into a coma, the Holy Light energy continuously repaired his injuries, and Garp was already out of danger. He was probably asleep at the moment.

"Go and bring Mr. Garp over here! He's alright."

After saying that, Karl drew his raven from his waist and sighed, "I thought it would save me some trouble, but it turns out I still have to do it!"

Zoro has Fujitora, Sanji has Kizaru, Jinbe has Akainu, and Luffy has Garp. Now that Garp is no longer viable, Garp will have to fill in.

Actually, Karl felt that Garp could still fight in his current condition, but he didn't want to. After all, Luffy is still his grandson, and Garp couldn't really fight him to death... mainly because he didn't have the ability, you know!

Karl gently stroked the silvery-white blade of Raven with his left hand, looked up at the imposing Nikka Luffy in the sky, and sighed sincerely, "The world is changing too fast..."

"Next, I will deal with Straw Hat Luffy. His crew is in your hands. I hope you will not let me down. In this battle, the Navy must not only win, but also gain an advantage in all aspects. Understand?"

"Yes!"

Whether they were doves or hawks, everyone present gave Karl a lot of face, since Karl was the supreme commander of this operation. On this battlefield, his words carried more weight than Kuzan's.

Under the watchful eyes of all the lieutenant generals, Karl radiated a dazzling golden light, revealing only a human-shaped outline. Then, the light began to fade, and with a "biu" sound, the human-shaped ball of light dissipated into a puddle of light particles, vanishing with the wind.

In the sky, Karl gripped the raven in his right hand, looked at Luffy ahead, and smiled: "Mr. Garp is still your grandfather! You're really filial, Luffy!"

Luffy completely missed Karl's subtext and laughed nonchalantly, "It's okay, Grandpa won't blame me. I never blamed him when he beat me up as a kid!"

"Hahaha~" Karl chuckled.

"Uncle Karl, I will defeat you! I will avenge Shanks!" Luffy's gaze was very firm. He knew very well that Karl was strong, because it was Karl who personally sent Shanks to Impel Down.

However, after the battle with Kaido and the awakening of his Devil Fruit power, Luffy felt that he now had the ability to go toe-to-toe with Karl, and at least he wouldn't be as powerless as before.

"Defeat me? That depends on your skills. But even if you defeat me, so what? All your crew members, except for Zoro, Sanji, and Jinbe, have been captured by the Marines."

"If nothing unexpected happens, Zoro and Sanji will soon be defeated as well. Even if you defeat me then, how much strength do you have to deal with three admirals and a dozen vice admirals in the Navy?"

It must be said that Karl was telling the truth, and Luffy clearly realized the seriousness of the problem.

"Uncle Karl, even if I'm destined to lose, I will never give up. Let's have a manly duel, Uncle Karl!"

"If I win, you'll let us go! How about it?"

Luffy is a bit cunning; he knows Karl is easy to talk to, so if he can win, he can lead his crew to escape this predicament. He still trusts Karl's character.

"And what if you lose?"

Luffy's smile froze; clearly, he hadn't figured out what would happen if he lost.

Seeing this, Carl laughed and said, "If you lose, you'll have to obey all the Navy's orders, how about that?"

Luffy was stunned. If he followed all the Navy's arrangements, was this... still the life he wanted?

However, at this point, he seemed to have no better options.

Chapter 366 Naval Hero VS Pirate King

Seeing Luffy's stunned expression, Karl decided to add fuel to the fire.

To deal with a young guy like Luffy, you can't use the forceful approach; you have to go along with him and he'll fall for your tricks.

"How about this! Luffy, you are the Pirate King, and I am the Marine Hero. This is a destined showdown, just like Roger and Garp back then."