Conversation so far:
What was giant killer and why was Rey Mysterio called that?
Rey Mysterio became a giant killer by defeating large opponents such as Kevin Nash, Bam Bam Bigelow, and Scott Norton.
when was Rey Mysterio's unmasking?
In 1999, Rey Mysterio lost a Hair vs. Mask match, forcing Mysterio to remove his mask.
what happened after Rey Mysterio's unmasking?
Rey Mysterio publicly expressed his disappointment over being unmasked.
did Rey Mysterio win any titles?
In July at Bash at the Beach, Rey Mysterio defeated Psicosis to earn another opportunity at the Cruiserweight title. The next night, he defeated Malenko to win his first Cruiserweight Championship.

Question: did he set any records?
Self-contained rewrite: did Rey Mysterio set any records?