Mad Mew Mew% on switch. You can enter the mad mew mew door after exiting the mettaton EX room. Time ends either when you spare mad mew mew, or when you land a killing blow on her. Not everyone owns Undertale on their switch, but it would be an interesting category.

The only other suggestion I have is chapter 2 NG+. Start chapter 2 from a completed chapter 1 file. You are allowed to have anything from chapter 1 that may benefit you. The only major timesaves would be the werewire battle, the Rules fight, and the queen fight.

What about Hacker percent? Trigger the hacker fireworks cutscenes as fast as possible.

Here is what the route would look like:

In Chapter 1, play mostly to the all bosses rules until you talk to Jevil in the castle. Make a small detour for the Ragger in the forest. Once you get into seam's shop after talking to Jevil, buy the spooky sword after getting the last key piece. Once you have reached the castle, you can either fight Jevil, or make your way to the hip shop. Getting to the hip shop first is advised, as you must  beat Jevil by fighting. Buy the Dainty Scarf and the Brave Axe in the shop.  Take the elevator back to the ground floor once you are done. Take the other elevator to the Jevil fight. Beat Jevil by fighting. Once you are done, get back to the top floor using the elevator. Next, fight K Round and King as you would normally, then finish the chapter normally. 

Once you start chapter 2, make a small detour for the Fiber Scarf in the Cyber Field. Next focus on getting the thorn ring as early as possible. Farm at least 1997 g, then use the text overflow glitch to get the Thorn Ring. Next, warp to the trash zone using the same glitch. You won't need to fight the dance trio, since you will be aborting your snowgrave route. In the city, follow the early thorn ring snowgrave route. Pick up the bounce blade in the middle of the city. When you get to berdly, it dosen't matter which option you choose. Beat berdly using ice shock with the thorn ring. Finish the rest of the city as normal, sparing spamton on the way. Once you reach the mansion, follow the chapter 2 all bosses route until you get back to the warp door. Warp back to the cyber field, and enter the dance trio shop. Buy the Mecha Saber and Auto Axe. Set up the wrong warp glitch, then make your way to where the first Berdly fight would have been, wrong warping at every screen transition. Make sure you hit all 70 dots on the long teacup ride so you can grab the Ragger 2. Wrong warp all the way back to the shop. Then use the door to warp to the trash zone. Get the keygen from spamton, then warp back to the mansion. Reconnect with your all bosses route, and beat spamton neo by fighting. Complete the rest of the mansion as normal. Fight the final bosses, and finish the chapter. Complete the ending as normal, and end off with time as normal. Equipping your most powerful weapons is strongly advised for this run.

all weapons% complete both chapters while obtaining every weapon. 

Weapons:

Spooky Sword
Ragger
Dainty Scarf
Brave Axe
Devil's Knife
Fiber scarf
Mecha Saber
Auto Axe
Ragger 2
Freeze Ring
Thorn Ring
Bounce Blade
Puppet Scarf

potassium% would be different from any% though. Just get to the door in cyber field and warp to the trash zone, than play as if its any% nmg until the second banana. An optimized run would be a bit over 30 minutes long.

Jaq is at it again. Doing another record sweep.

Oh my god. Ash finally did it! He fianlly beat nharr's record that stood for over a year! The new 1.09 wr is a 26:04, which means chapter 1 runs are back! (Maybe)

Bro this has to be the longest standing world record that exists in deltarune. Ashmichda and ThemagicD seem to be closing in on this wr, so I'm excited to see what happens.