Guide — Undertale Adventures X Wiki

Guide

Browse guide articles for Undertale Adventures X.

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Guide: October 13, 2026
Updated

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Guide: Starters, Bosses, and Meta

Undertale Adventures X guide covering defense mechanics, starter unit viability, difficulty modes, and Mettaton NEO endgame boss killing.

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Codes1Guides detail active promo codes, step-by-step redemption instructions, and troubleshooting tips for claiming free items.Teams1Articles break down optimal meta lineups, unit roles, tier rankings, and substitution options for challenging content.Gamepasses1Browse gamepasses articles for Undertale Adventures X.Showcases1Browse showcases articles for Undertale Adventures X.Walkthroughs1Browse walkthroughs articles for Undertale Adventures X.

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Guide: Starters, Bosses, and Meta

Undertale Adventures X guide covering defense mechanics, starter unit viability, difficulty modes, and Mettaton NEO endgame boss killing.

Corridor Dust Sans unit showcase

Review the Undertale Adventures X Corridor Dust Sans showcase, covering boss drop requirements, attacks, Blood typing, and team leader skill synergies.

Neutral Corridor Act 1 guide

Beat Neutral Corridor Act 1 in Undertale Adventures X with this guide covering Mettaton NEO leader buffs, Knight Knight DPS, and soak setups.

Gamepasses: Official Prices and Perks

Undertale Adventures X gamepasses include VIP, SHINY Hunter!, Supporter, +50% Tokens, and 2x XP. Check official Robux prices and catalog perks.

Codes (October 2026) – Working Codes

Undertale Adventures X: 13 displayed codes (2 multi-source reports, 1 reported, 3 disputed, 7 expired or likely expired); last successful source read October 13, 2026. Checked twice daily.

Meta Team Comp and Best Units Guide

Build the strongest Undertale Adventures X meta team on Roblox using top S-tier towers like Sans, Asriel, Mettaton NEO, Undyne, and Papyrus.