These are side unlocks with published requirements. They are not part of the first-reset loop.
Bike from Susie and Lancer
Castle Town is in the Other World. One page says you need LV 6100 and 100 TP, and that the Other World itself opens at level 3000. The reset-boss table adds 2 resets to that LV 6100 and 100 TP gate. The unofficial boss list's Two Bad Guys row instead says 2 resets, LV 4250, and 100 TP for the Bike. Fight the pair only when your save matches one of those gates.
Kill Lancer first. He rolls into a ball that does not take damage. Susie gains a glowing-axe phase with invulnerability. The listed drops are the Bike and a Lancer Cookie. The Bike is described as +15 movement speed and a multi-hit stun on an active skill slot.
Last Breath Sans and Counter Bone
Both the unofficial boss list and the elevator guide put Last Breath Sans above the elevator button between the Lab and the CORE. Jump into the opening over the button. The gate is LV 6050, 100 TP, and 1 reset. The fight is an endurance: normal swings miss, and you touch a FIGHT or Act button. The elevator guide says 40 touches. The reward is Counter Bone. That guide also lists a 15-second cooldown, a block of up to 3 hits, and a counter of 500,000 to 1,500,000 damage. Final Last Breath is the hole behind him and is listed at 8 resets.
Alphys NEO and the Hacking Phone
A November 2026 lab guide says Alphys NEO is deep in the True Lab, past Reaper Bird, Lemon Bread, and W.D. Gaster. Its entry list is reset 23, level 600, Pocket Core from Mystery Man in Hotland, Dimensional Box from Alphys's quest, and Corporate Wisdom from 80 Snow AU wins. The fight is described as a survival and terminal puzzle, not a normal health bar, because walking into Alphys triggers a soul bomb. The reward is the Hacking Phone. A version 11.1 video also shows Alphys NEO dropping the Hacking Phone, so the item link is older than the November requirement list. Treat 23 resets and the three items as that guide's checklist, and confirm them at the door.
The same guide says Help From The Void, in Hotland, wants the Hacking Phone plus reset 50, level 10000, 2500 TP, and a True Reset. A version 12.0 fight video covers that encounter's phases. Those entry numbers were not repeated on the video page itself.
Numbered tunnel chests
A chest route says the Ruins and spawn tunnels hide numbered containers:
| Chest | Listed contents |
|---|---|
| 1 | Light Shoes |
| 2 | Manly Bandana |
| 3 | Old Tutu |
| 4 | Stained Apron |
| 5 | Heart Locket |
| 6 | Cowboy Hat |
| 7 | Crafting ingredients |
Tools named for the route are Climbing Gloves for 5,000 Gold from a Snowdin canine vendor, a grapple for 300,000 Gold in Cyber City, and a War-Axe Hammer for barricades including a level 2500 Ruins chest. Another route says the axe and grappling hook are simply sold in the spawn shop, with no price. Pay the price your NPC shows.