Rick and Morty stepped into the garage, turned on the portal gun, and entered the whirlwind of color and light. "We're going to find the Truth Tortoise, Morty," Rick declared as they rocketed through dimensions.

"Rick, I'm not sure about this," Morty stammered, clutching his chest and glancing around, "What if we can't handle the truth?" Rick merely laughed, pulling a flask from his pocket.

As they landed in the dimension of the Truth Tortoise, they found themselves in a labyrinth of towering truths and deceiving lies. Shadows danced, captivating their senses.

Gradually, they found the Tortoise, a monumental figure amidst the labyrinth of knowledge. Its ancient eyes pulsed with wisdom, and it beckoned them closer.

"We found it, Morty!" Rick exclaimed, but as soon as they approached it a zombie-like figure emerged from the shadows, hissing at them to leave.

Morty screamed, clutching Rick's lab coat. "Rick, what is that thing?" he managed to stutter. Rick looked at it, his eyes narrowing. "Looks like our babysitter."

Rick pulled out his arm-cannon, aiming at the zombie-like figure. “This guy doesn’t seem to be too happy about our presence, Morty. Time to leave," he declared.

As they fled, the zombie-like figure chased them, it's hoarse voice echoing throughout the labyrinth, "Return the truth. Return the truth."

"We didn't even take it!" Morty protested, his eyes wide with fear. Rick grumbled. "He’s faulty, Morty - doesn’t make sense. We gotta fix this" he replied.

Rick devised a plan, making a frantic dash back towards the Truth Tortoise. Morty followed, his heart pounding in his chest as the zombie-like figure pursued.

Rick started speaking in an ancient language, his words causing the Truth Tortoise to glow. Suddenly a swarm of miniature tortoises appeared, floating around them.

Morty watched in amazement as the swarm engulfed the figure, causing it to drop to its knees. His voice softened, "Return the truth.."

The zombie-like figure started to transform, its frightening facade morphing into a gentle, elderly creature. Its agonized expression subsided, replaced with sorrowful relief.

Morty blinked, finally understanding. "He was guarding the truth... not attacking us," he muttered. Rick nodded, a rare look of sympathy on his face.

They moved over to the transformed figure who spoke in a tired voice, "I only wanted to protect the Tortoise. Please, respect its wisdom."

"We understand," Rick said, a rare sentimentality in his voice. They left, the transformed figure waving them goodbye, a relieved smile adorning his face.

As they ventured out of the labyrinth, the Truth Tortoise watched them go. Its ancient eyes shimmered in the darkness, holding secrets of countless millennia.

Once back in their own dimension, Morty looked at Rick, more puzzled than ever. "So the truth... was just about understanding and respect?"

Rick glanced at Morty, a smirk playing on his lips. "Sometimes, Morty. Sometimes that's what the truth is all about.” The garage fell silent, filled only with understanding.

The adventure was over, but Morty felt wise beyond his years. "Maybe next time we find a truth, it won't be so scary," he mused aloud.

Rick chuckled, ruffling Morty's hair. "Maybe, Morty. But where would the fun be in that?" His words hung in the air, a testament to their wild adventures.

And so, the adventure ended, not with a bang, but with an understanding. The garage was silent, save for the hum of the deactivated portal gun.

There was a new resolve in Morty's gaze as he looked around the garage - a promise of respect for the incredible universe they got to explore.

And as for Rick, he watched Morty, a fondness in his eyes that was seldom seen. "To the next adventure, Morty," he said, lifting his flask.

Morty smiled, nodding to the wandering genius that was his grandfather. "To the next adventure, Rick," he said. And so they stood, ready for the universe's truths.