Yes. All 1 [CHARA!] Undertale Dungeons scripts on HaxHell are free to copy and use.

Not right now. Every [CHARA!] Undertale Dungeons script currently listed uses a key system. New scripts are added daily, so check back soon.

None of the current [CHARA!] Undertale Dungeons scripts are marked as mobile-friendly yet. Check each script page for supported executors.

Open a script page, copy the loadstring, join [CHARA!] Undertale Dungeons on Roblox, paste the code into your executor and press execute. Each script page lists the executors it was tested with.

Using scripts breaks Roblox's Terms of Use and can get an account banned, so many players use an alt account. HaxHell lets the community report broken or harmful scripts, and patched scripts are labeled so you can avoid them.