bumping because i'm desperate to find his old stuff too
he dropped an archive of all his stuff when he made a patreon and a pixiv fanbox:
https://kemono.cr/fanbox/user/110705782/post/8790784
https://kemono.cr/patreon/user/127192376/post/115062885/revision/10289804
sadly the MEGA link got deleted less than a day after somebody leaked it to kemono, and he's deleted the post off of his pixiv fanbox.
the best bet to find it would be either asking him via DM or on his discord server

known missing sets:
all his shota stuff from his old mastodon social account
the fallout TV show set commissioned by DegenRegenRox on twitter
some mona (genshin) x mutant dog stuff
the final tatsumaki image (there's worms coming out the tips of a cockroaches dick, and she's talking about them killing human's in the last refugee camps)
there's probably more too.

info i know:
he's called DreadMegalo now
his shota stuff was posted to a now deleted mastodon account, also called MightyBadTales
they have a reddit account called 'karlosnalda' where he used to post his tatsumaki stuff to r/NastyHentai
and someone will have the now deleted archive, which had ALL his art in