where is its initiative

I'm assuming they didn't list it due to it's dexterity modifier being 0, making it's initiative modifier 0 as well. Hope I was helpful/not too late to help. 

no its not to late thank you for the help

My team is trying to seduce him help!

My rogue made this his son wtf do I do

Did he try to legally adopt it or something? I'm assuming the rogue is a dragonborn. If you can, just say that since dragonborn aren't like literal Dragons, and therefore they can't fly, he wouldn't be able to raise it properly. Then you can have whatever adopting process he's going through declared void. Hope this helps.

No he's a an arakockra who tamed it and now acting as its father

Maybe if it starts causing problems for the party (eating npcs, interfering with battles, destroying things, ect.) the other party members will insist that they get rid of it?

I hope

Did it work?

Remeber as the DM you have to ability to say No. High rolls and Nat 20's don't always mean success, sometimes it means not suffering extreme negative feedback from the action. For example. I have a 30-foot wall that a character wants to run up who has good acrobatics. He rolls a natural 20. Does he run-up? No, because no matter how good at acrobatics or physically strong you are, you can't just run up a sheer surface. So maybe the result is they get 7-10 feet up, fall, but don't take any bludgeoning damage.

So with the seduction of a dragon or taming of it, you have to remember that dragons aren't animals, they are intelligent and powerful creatures. They have reason, the capability to speak and commune with other sentient races, so does it truly make sense for a character to seduce something that is almost always stronger, smarter, and usually older than they?

Alright so if a character was, say, 1v1ing this boi, would they at least stand a chance of scaring it off but not killing it? do they get scared off?

I would always try to flavor the situation depending on how the 1v1 is going.

Red dragons are self-serving creatures by nature (in my interpretation of their behavior at least) and therefore even though it might be insulting to a dragon's pride, they might choose the humiliation of self-preservation and retreat instead of a shameful death.

Alternatively, since dragon wyrmlings are meant to be very young, the notion of battle might be scary enough as it is, especially when faced with death at such a young age.

An intimidation check by your player might be warranted, or you as the DM could choose to have the dragon flee instead of fight.

What happend with the dragon?

hang on, the fierce dragon has a dexterity modifier of 0 and a score of ten, that's the same as a commoner, all dragons should at least have dexterity modifier of 2, if not 3, think about it, dragons have wings and fly, is that not dextorous? 

how do you even tame a bloody dragon, and I mean in ability checks and skill, wait never mind, it would be animal handling but aren't dragons extremely smart, you'd think it'd be something else, like persuasion and maybe even intimadation

Quote from LordGamerBoi >>

No he's a an arakockra who tamed it and now acting as its father

 WTF, he's an Aarakocra bro, it's a bloody dragon, a smart one, I don't think a dragon, even a baby one, would think: jee, that dude looks kind, although he is all feathery and probably tastes like chicken, I'll be his son, NO NO NO NO, that's not how it works!

If he was a Dragonborn maybe the baby would think, he's nice and he's like me, even better, a red Dragonborn, but Aarakocra, NOOOOOOOO

Quote from ElvenRuneKnight >>

hang on, the fierce dragon has a dexterity modifier of 0 and a score of ten, that's the same as a commoner, all dragons should at least have dexterity modifier of 2, if not 3, think about it, dragons have wings and fly, is that not dextorous? 

Then make all your dragons have that... these are meant to be the baseline average and not always the end-all-be-all... for instance, I am currently using the Red Dragon Wyrmling stats for an Adult Red Dragon that had been horribly debilitated decades before. Will it still be a Challenging encounter for my 4-th level PCs and a memorable experience? hopefully!

Probably just clumsy for their size since they're young.

I mean it's like a toddler of dragons, no matter what it has it's gonna be clumsy. In fact the wings might get in the way at times.