Mystic @GuilhermeMattoss1 #1221652603
27 August 2019
account created (per Roblox API)
25 Aug 2026, 04:50
last measured (UTC)
Username record
@GuilhermeMattoss1 — observed 25 August 2026
Roblox’s API lists prior usernames without dates; the dates above are when this register observed each name, which bounds — but is not — the change date.
Groups owned (as measured)
Open data
Download this user’s observed record: username history (CSV) · record (JSON)
Also a member of
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1,109,888Glory Kill Testing Fan Group (WE ARE BACK)#14792838 · Fans
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952,677Hapless Studios#5502618 · Supporter
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740,575Jean's Bizarre Community#6356872 · Member
726,582BEAR*#6545227 · Member
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70,073HOURS Fan Group#9300327 · Member
67,351Astrabasis Interactive Media#7888688 · Member
44,222Microwave Dinner#5266802 · Microwaves
40,408REx:R#3267206 · Miner
20,506Bismuth Studios#6027240 · Member
18,453Epic Department#7665231 · Sapling
8,131Rchive#13928593 · Member
6,232Earthyware Inc.#5029708 · Bread
5,982Phantasmagoric Figments#15170886 · Surrealist
4,415Classic Restoration#14767017 · People
1,825Voltspike#11283847 · Member
1,010The baked bean team#13165396 · bean people
536Frozpitality#35039157 · Member
341BedClouds#35878451 · ‴•°
84Infinity explorers#14467930 · D
8Diagonally Broken#266275197 · Qui Notum
4Membership and rank as measured from this user’s public group list.