Rex had to spit out confeti from his mouth as pinkie pie jumped all around him. She was singing a song he couldn't really keep up with ,as the force from the party popper dazed the poor guy. He sighed as he heard her sing once the ringing stopped.

welcome welcome welcome its nice to meet you! Welcome welcome welcome it great to meet you whoo

Rex reached out cupping a hand over the mares mouth. A grimace plastered onto his face. The party mare started to slow down seemingly understanding. He pulled his hand away revealing a smiling pony's face. " Oh my Celestia it's so good to meet you! Well technically I met you a few days ago but you seemed upset. Probably because all those nasty wounds but they are all gone! You still look upset but we're gonna have so much fun! You'll be smiling in no time."

He grumbled quietly to himself but simply shrugged. He was only barely able to understand what she was saying due to how fast she was talking. But she was excited. She used a single hoof to grab his free hand and pulled him along.

The town was pretty much what he expected. A Very old fashion type of village esthetic. Pony pulled carts and had plenty of stands with various goods. Unfortunately he was getting a lot of looks. It varied between looks of horror an outright disgust when they saw him. He was fairly certain if pinkie wasnt the one pulling him he'd have seen an angry mob by now. But ponies mostly calmed when they saw pinkie. Hell if one of the elements had discord as a friend then why not a ape like alien.

They soon arrived at suger cube corner. A placed know for sweet treats and being a local hangout location. She pulled him inside and gave a quick wave to the ponies in charge before shoving him into a side room. Rex didn't really have time to ask questions before a cannon went off.

Pinkie party cannon launch both confeti and some various candies. The room behind was filled filled with ponies he didn't know and a two he did. Rairty and rainbow dash stood near a grey crossed eyed pony who was devouring muffen. Above everyone hung a sign. 'welcome to Ponyville rex' pinkie was beaming with joy with looking at the stunned human.

Rex blinked several times before walking forward scanning the room. It was a party for him. He couldn't even remember the last time he was at a party. "Uh thank you?"
Pinkie blinked for a second as his tone reached her ear. It wasn't necessarily a angry or even upset but it did sound fairly uninterested. His grimace still present on his face.

Rex slowly walked past pinkie an headed into a corner of the room. He made no real effort to spink to anyone and just kept to himself. Admittedly rex wasn't really into partying. At least not anymore. But while his face didn't show it he appreciated the effort. Although pinkie didn't know that.

Still her mission in life was to make everypony happy and to make them smile. She wasn't ready to give up. She quickly grabbed a tray of food and rushed to his side.
"Hey Rexy I got some super delicious treats! Here try one!" He raised a brow as pinky lifted a green cupcake to him. He quickly took the treat and shoved it into his mouth. He chewed quietly before swallowing the treat. "Well? What whatcha think rexy? Is it super duper good!" He puased thinking to himself

"Hmm not bad. Don't believe ive ever had watermelon cupcakes before." His calmed tone did wonders for pinkies confidence. But he didn't smile. She offered more treats which he accepted. But despite eating all of the treats she offered his expression remain the same.

She then continued dragging him to several party games. The games varied from 'Cornball' to 'Pin The Tale On The Pony'. He willingly joined in the games and he even managed to make small talk with the grey pony. The mare was dizty doo but she claimed everyone just called her derpy. He gave even more of an annoyed expression. "Eh im just gonna call you muffens." The mare gave him smile seemingly enjoying the new name.

Rex smirked which didnt go noticed by pinkie. It was the closest thing to a smile he had made all night. An it wasn't even her who caused it. She grabbed him by his hand an pulled him back into more games. The party ended up lasting more into the night then she had planned but everyone (except Rex) seem to be smiling and enjoying themselves to much to care.

Pinkie smiles had long since faded. Her irritation staring to catch up with her. Still they continued. She did notice rex becoming less interested as things went on. He hadn't made anymore attempts at conversations and retreated to the corner.

Pinkie gasped as she saw something unthinkable at her partys! Rex started to yawn. Her mind was practically blareing alarms. He must be bored! She quickly moved to try and do something but it was to late. It was if his yawn reminded everyone the time. Ponies walked out untill only Pinkie an Rex remained. Her mane went comicly flat as her colors started to dwindle. He bowed her head and walked away a tear falling. Rex however did notice.

outside sugar cube corner.
Pinky sat at the entrance weeping quietly to herself. The cakes had long since gone to bed much like every pony else. But she stood alone her tears running down her cheeks. She was barely able to recognize someone had placed not a hoof but a hand on her shoulder. Next to her Rex had kneeled down with his sword on the ground.

His expression actually showed something besides a grimace. She saw the concern in his eyes. "Pinkie whats wrong?" His question came out like a gental whisper. He was trying not to startle her.

Pinky wiped the tears from her face. She looked away in shame. "I tryed really hard today rex. I just wanted you to smile an enjoy your first time in ponyville with me. But you didn't really seem ro enjoy any of it. You didn't even smile!" Her voice was filled with sarrow. A long silence filled the area.

"I dont smile pinkie. Like at least very rarely."
His response definitely caught her off guard.
"Pinkie I have what we humans call resting bitch face. Basically my face wont always express how im feeling especially when im relaxing. I wasn't upset pinkie I was just chillin."

Her jaw dropped as rex gave out a chuckle. Follow by a very small but sutle smile. "Im not a big party guy. For me a good party is one I get so drunk I cant remember but...I really enjoyed this. Hanging out with you was more fun then I thought. But mabye next time something a bit more suddle. Just us and a game or two." Her mane instantly went poofy once more as she wrapped her hooves around him. She was overjoyed at the news.

"So this means we're friends right!? Please please please please!" He blushed a bit at the mare sudden cheeryness. He also wasn't a huge fan of hugs but for some reason he didn't seem to mind. He just laughed before putting a single arm around her.
"Sure pinks were freinds just take it easy ok."

The mare just smiled happily. Rex really hoped things with the others could go well.

Author's Note

In case yall are wondering this is probably gonna be a herd/poly thing. Hope yall dont mind.
Also im just not a huge fan of calling derpy that ik its the name the fan base calls her and I get it.
But id still rather give her muffins as a nickname.