In the world of Battle for BFDI, the atmosphere was filled with anticipation as the host Four, a numerical figure, announced the peculiar challenge for the day.

"Today's challenge is... to fart! The team with the least farts will be up for elimination!" Four declared, causing a wave of laughter to ripple through the contestants.

X, Four's co-host and friend, added, "Make sure it's fair and square, everyone! No cheating!".

Among the contestants, a box named Blocky had a mischievous glint in his square eyes. He whispered his plan to his teammates.

Meanwhile, a soft-spoken Tennis Ball thoughtfully mentioned, "We should be careful. This challenge could be trickier than it seems."

As the challenge began, the contestants nervously huddled together. Even the usually fearless Pencil seemed a bit wary.

The fiery Leafy, however, was determined to win. "Our strategy should be to hold it in as long as possible!" she suggested.

As time ticked on, the contestants grew increasingly uncomfortable. Tension was high, and so were the stakes.

Blocky, in his overconfidence, couldn't hold it anymore. The moment he farted, his team groaned in disappointment.

"Oh no, Blocky! We're at a disadvantage now!" yelled Pencil, aghast at the sudden turn of events.

As the challenge wore on, one by one, contestants from different teams succumbed to the strange and amusing contest.

Leafy, stubborn as ever, was still holding on, her face turning a deeper shade of green as the minutes went by.

Finally, only two teams remained - Leafy's team and Tennis Ball's team. Four cheerfully announced, "It's a tiebreaker time!"

"Will it be a fart showdown?" wondered X, covering his laughter with a hand.

Leafy, mustering all her strength, whispered to her team, "We can do this! We've got to keep our farts in!"

Tennis Ball, on the other hand, had a different strategy. "Remember, it's okay if we fart. We just have to fart less than them."

The two teams gave it their all, awkwardly shifting around, some grimacing, others groaning in discomfort.

All of a sudden, Tennis Ball let out a small, quiet fart. His team gasped in shock.

"That's okay, Tennis Ball. We're still in the lead," a teammate whispered, trying to ease the tension.

Just as it seemed like Leafy's team would win, Leafy herself couldn't hold it in any longer. Her fart echoed around, leaving a stunned silence.

"Oh no," she gasped, "we've lost!". The reality of the situation sinking in, her team looked heartbroken.

Four couldn't contain his laughter. "And the winner is... Tennis Ball's team!" he announced, holding up the winning team's flag.

Tennis Ball grinned, relieved. "Well, that was quite a challenge," he laughed, his team cheering in excitement.

X patted Leafy's team on the back, trying to soften their disappointment. "Better luck next time," he said sympathetically.

The fart challenge ended, leaving the contestants with red faces and a lot of embarrassment. But they all agreed, it was certainly a day to remember.

They might have had their differences, but in the end, they laughed together, bonding over the silliness of the challenge.

All contestants knew that every day in Battle for BFDI was unpredictable, but this challenge was beyond anything they had ever imagined.

From the winners to the losers, everyone had a story to tell, a laughter to share, and a farty memory to cherish!

As the sun set, a new day dawned in the world of BFB. After experiencing such a wild challenge, they wondered - what could possibly be next?

But whatever it was, they knew they could face it. Because they had each other, and together, they could turn even a fart into a hearty laughter.