Progression

Which boss to farm by level

Pick the next boss by your level and reset count, and keep the experience figures attached to the route that published them.

Which boss to farm by level

Pick the next boss by your level and reset count, and keep the experience figures attached to the route that published them.

Use this as a boss picker, not as an official drop table. Experience numbers below come from a November 2026 route that repeats the same figures on its reset page. Where an older boss list gives a different gate, both are shown.

Level bands

Band Boss Gate reported with the EXP route EXP or levels reported Where
1 to 200 Mad Dummy Reset 0, behind spawn near the bridge 90 to 130 levels per clear Spawn
1 to 200, high resets Grillby Level 5 and reset 7 in one route. A farm note says the fight is long and can jump a low level toward the 400s. 5,000,000 EXP Snowdin bar
200 to 305 Error Sans The EXP route says reset 1 and 250,000 EXP. The unofficial secrets list and a version 11.2 comment say reset 2. 250,000 EXP if the fight lets you in Second waterfall on the right at spawn
305 to 1600 Sus, also called Impostor Reset 2 and LV 305 on both the EXP route and the boss list 5,560,000 EXP Hotland, past the rock parkour. Stand in the center to avoid ranged patterns.
1600 to 3045 Ultra Undyne EXP route: reset 5. A separate farm note pushes Undyne ULTRA until about 3450. 8,500,000 EXP Doodle Sphere, next to Saness
3045 to 3250 Temmie Reset 0 on the EXP route 11,500,000 EXP Back right of Underfell
3250 to 3985 OOF Head Reset 3 14,530,000 EXP Behind Ultra Undyne
Around 3985 to 4250 or 4900 Bob The EXP route's two tables disagree on whether Bob ends at 4250 or 4900 15,000,000 EXP Middle of Underfell
4250 and up Rudinn Reset 0, LV 4250 16,500,000 EXP plus Kromer on the EXP route. The gold table says 9,000 Gold and 6 Kromer. Castle Town, Other World
Toward 5500 Hyper Dust Sans The EXP route says reset 0 and starts him at either 4250 or 4900 20,000,000 EXP Doodle Sphere, next to Ultra Undyne
Toward 6000 Outertale Sans Reset 0, from about 5500 30,000,000 EXP Doodle Sphere, next to Hyper Dust Sans
After 6000 Epic Sans 16 resets, level 6000, 1000 TP 100,000,000 EXP and Epic Eye Other World
After 6000, if Epic Sans gives few levels DT6 1 reset and LV 6000 on the EXP route. The boss list also allows 500,000 Gold, 1,750 TP, or 200 LV. Flat 200 levels on the EXP route Behind spawn, near obbies

How to choose

Stay on the earliest boss that still moves your level. Mad Dummy is the reset-0 opener because the route says it grants levels directly. Sus is the long reset-2 band. Ultra Undyne is the Doodle Sphere jump once reset 5 is allowed. Underfell Temmie, OOF Head, Bob, and Outertale Sans cover the rest of the push to 6000 if their gates match your resets.

Killer Sans is a separate TP option on the farm page: reset 6 and 45 TP per kill. FS Emerald Papyrus is listed from reset 12 for 50 Kromer and 50 TP. Those are not EXP-route bosses.

Early story clears, if you are not skipping

The unofficial main-world table, for players who fight the route in order:

Boss Requirement Reward listed
Flowey LV 1, The Start 50 XP, 25 Gold, Bandage
Dummy LV 1, Ruins 20 XP
Froggit LV 1, Ruins 25 XP, 50 Gold
Toriel LV 2, Ruins 400 XP, 90 Gold, Toy Knife, Monster Candy
Papyrus LV 5, Snowdin 775 XP, 135 Gold
Undyne LV 10, Waterfall 1,975 XP, 180 Gold
Undyne the Undying LV 10 and 1 reset, Waterfall 9,500 XP, 600 Gold
Muffet LV 15, Hotland 2,475 XP, 120 Gold
Mettaton EX LV 25, the CORE 3,125 XP, 300 Gold
Asgore LV 35, reward line was cut off in the table extract Location continues into the throne route

Asgore's Trident is listed on the item table at 75 damage, a crossroads value of 12, and cooldown 1, from Asgore in the garden.

FAQ

Frequently Asked Questions

What version is listed on the Roblox page?

The Roblox games record, updated October 29, 2026, lists game version 12.4. The description says the experience is based on Undertale by Toby, names creator YaoYN, and links the YN Studio group. That record does not include an itemized patch note.

What do you need for a standard reset?

Two public descriptions disagree. A game reference says the barrier's final room accepts a reset at level 6000 with 70 TP, then wipes level and TP and applies a level booster that can stack to 34 percent. A November 2026 walkthrough instead says level 6000, 100 TP, and a gold fee, and that weapons stay. Check the barrier prompt on your save before you spend the run.

How do you redeem a code?

Open Menu at the top right, then Settings, type the code into the box labeled Code here, and press Redeem code. Current code lists say the account must be in the YN Studio group. Codes are reported as case sensitive and single-use per account.

Where do skills come from?

Community guides say you need level 6000, then spend 100 Kromer per spin at Ralsei's Skill Awakening Workshop in Castle Town. Upgrading a skill you already have is described as another 200 Kromer. The Extra capacity pass adds 18 skill-storage slots.