This Sans boss is quite advanced and a very hard, but fun, challenge at the same time!

Sans only has 1 HP like in the original game, but you need to hit him over 150 times before he stops dodging and gets tired out. After defeating Sans, you will gain the BLUE SOUL. If you right-click it, it will send everything in a 30-block radius 20 blocks up into the air. If you sneak/shift and right-click, it will summon a friendly Gaster Blaster 5 blocks above your head which will protect you from mobs and other dangers!

💀 Sans's Attacks:

Bone Throw: This is the first and most basic attack. He will look at you, then shoot out a burst of bones going in all directions, making it really hard to dodge.
Blue Bones: These will come out of the ground and give you Slowness, basically trapping you and dealing heavy damage. To escape, you will need to jump out.
Orange Bone Trap: This will trap you for 5 seconds, dealing heavy damage, and then let you go.
The Gaster Blaster: The most iconic attack! The GASTER BLASTER will deal insane damage and knockback, making it hard to get close to Sans and breaking your armor quickly. It lasts 10 seconds.
Blue Heart Ability: Sans's magic makes you fly 20 blocks into the sky, causing you to take a lot of fall damage.
Ultimate Attack: This only occurs once towards the end of the fight when he says, "Survive this". You are frozen and 5 Gaster Blasters spawn around you, dealing insane damage. You will need enchanted golden apples to survive this!
The Final Stand: Before the last hit, Sans will launch you above the clouds and let gravity take its course. This is a last-ditch effort to kill the player.

⚙️ Sans's Mechanics:

Sans can dodge almost all of your hits, no matter what they are.
Sans remembers if you have died and mocks you after dying.
Sans only has 1 HP, so bringing an insane sword into this fight is not really needed, but a spear or bow can help make him more tired.
Sans will talk throughout the fight, getting more and more frustrated.

In-game footage of my friend and bosses getting destroyed (sorry for low quality):

⚠️ DISCLAIMER! SANS DOES NOT WORK WELL AGAINST MULTIPLE MOBS AND CAN SEVERELY LAG YOUR GAME OUT! Sans is meant to be a one-on-one fight against players, but somewhat works against mobs. If you want to use Sans in a custom map or video/review, you are free to do so, just credit me in it and link the addon page (@NotBonzz)!

Credits: @NotBonzz on YT with the smiley face!

Sans Boss Fight!