PS: I made a Discord server, feel free to join we'll gladly accept new members, Discord invite [discord.gg].
So you've come here to learn, how to kill Ali-A, well, you'll first need to find Ali-A, it's not as hard as many think.
So, what you need to do will be presented below:

• You'll need to get a copper sword, then make lots of threads about giving away a special Meowmere Star Wrath, that will grant 100 defense due to a weird glitch.
  
  
• You'll need to make videos with lots of red arrows , don't forget always show lots of emotion in your thumbnails, and just make clickbait titles, like ''OmG TeRrArIa bAtTle RoYaLe hAs tHe tHaNoS GaUnTLeT iN sEcReT fiLeS''.
  
  
• Once you've done that you'll need to make a world, name it: ''EpicVR'', it HAS to be crimson, since crimson is red and red is the colour of love, Ali-A LOVES his fans, so that's why you'll need to pick crimson, after that you'll need to make the seed: ''Im so wet omfg yessss'', and that's it for creating the world.
  
  
• Now all you need to do is find him, he will be located somewhere in the ocean, since Ali-A is a rare shark specie. You can't lure him in with baits, but only clickbaits, you'll need to blast this video:
  At max volume and then you'll have a 99,999% chance of him to spawn.
  
  
• Now he's here, congrats you've found him, but, I forgot to warn you, he's way to strong, so you're probably dead, no worries the next part will tell you how to prepare for this fight.

Now that you've found him, you need to prepare for the fight.
What you need to get (and how to get them) will be listed below:

• You'll need a cactus sword, but not just any cactus sword, you need a glitched cactus sword with extra movement speed, +123, to be exact, you can get this by going in to the files of terraria, then go in to that file that everyone knows of, then edit the file to, ''MovEX:{+123}'' , save the file, then delete and donwload Terraria again and voilla.
  
  
• Okay, so now you need the real knife, it's ''real'' good if you know what I mean nyeh nyeh nyeh!
  
  
  Oh, wrong guide, sorry.
  
  
• Okay, so now you need a full set of platinum armor, but hold on, it's glitched again, so you'll need to go in to your files again (that file everyone knows) , then find the platinum armor pieces, and edit it like this for every file: ''Mo4nal:{vv}'' now what this will do is increase the defense by 300!
  
  
• Now for accessories you can just go ahead and equip whatever you want, those aren't that important, some defense or attack accessories would be advised though.
  
  
• Now for the potions you'll need,
  1 Iron skin.
  4 Default dances
  9 Gravity pots.
  
  
• Now the last thing you'll need is a good game sense, with that I mean just, good doging and know what the patterns are, and you MUST know which things are clickbait and which are not, he will throw lots of videos at you, which you will need to dodge.

That's it, now the only thing left to do is fight him!

So, you've prepared yourself for this fight, you've come so far, you must defeat him on your own, skill is mostly needed, but.. I can't really help you in that.. but what I can do is give you tips about the fight.
Here are a few tips about the fight, and some of his attacks.

• You must dodge most of his attacks, I will list some of his attacks below.
  
  
  These attacks are pretty hard, you'll need to dodge them at a fast pace, they fly in very fast, and you need to determin wether they're clickbait or not in just milliseconds.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
• He will fly high up in the sky, the music will go away, but.. this is a trap he is not gone! When you think he's gone, he'll just fly down at a speed of 450 miles per hour, so don't let him out of your sight! Always be on the lookout and make sure he's really defeated.
  
  
• He has a few weak spots, one is in his heart, cause he's a very loving and caring creature, another one is in his ass, which will be very hard to get to, since he has such fast movement, and the last one is in his brains, since he's one of the most intelligent creatures in the entire universe, but again, quite hard to get to.
  
  
• Another tip I'll give you is.. he's very weak against pretty boys, just be a pretty boy and he'll be weaker then usual, and if you're underraged then it's even better.
  
  
• And the last tip about the fight will be, how to actually attack him, so, all you need to do is grab your sword, trash it, and get a Star Wrath, the glitched one of course, you'll use the same command as the cactus sword in the file, save it, and done.
  Now that you have your glitched Star Wrath you can attack him, whenever he's getting rest from throwing videos at you, you can strike, but that doesn't happen so often, since he makes so much videos at a fast pace, and they're all top quality, but you may still have a chance..

This battle will be very hard.. no one has done it yet.. but, I have faith, I have faith in you, one of you will find strength in yourself, and overcome this horrendous monstrosity, it won't be easy.. but you must, now I can't say anymore, I.. I have to go, or else he'll find me and then I'll...goodbye..

If you've killed him then..

Have you really?..

This can't be true.. I'm so thankfull, how.. how did you manage to do it..
I owe you my life!
I can't tell you how thankfull I am, you've really done it!
Congratulations!!! You are now, the best player in Terraria!!!
We must celebrate this immidiatly!
Epic!