Bosses
Long reset-2 EXP fight in Hotland.
Sus: Long reset-2 EXP fight in Hotland. Get it by Hotland lava entrance with an axe, reset 2 and LV 305. Use it to Repeat Sus from about 305 until Ultra Undyne is better, around 1600 on the EXP route.
Also called Impostor. The route says standing in the center avoids the ranged patterns. Tongue strikes and vents are named as the melee threats.
| Fact | Value |
|---|---|
| Name | Sus |
| Location | Hotland, past rock parkour |
Hotland lava entrance with an axe, reset 2 and LV 305.
Repeat Sus from about 305 until Ultra Undyne is better, around 1600 on the EXP route.
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.
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.
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.
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.