Your Virtual Friend!
Page 101 of a 1999 Tiger Electronics Toy Fair catalog, showing the toys.
Image from an upload of the catalog by RebeccaHoffman on archive.org.
Giga Pet Gabbers are unreleased, interactive keychains from Tiger Electronics. They appeared in Tiger's 1999 Toy Fair tradee catalog. They require two AAA batteries to function.
Two versions exist, including one based on Elmo from Sesame Street and another based on Salem from Sabrina the Teenage Witch.
The keychains feature the head of the fictional character they are themed after with a mouth that moves when it speaks, and they also have buttons you can press to interact with them.
The description for the Salem version says:And one of the keychain's lines is "Salem is happy".
The description for the Elmo version says:One of the keychain's lines is "Elmo wants to play & giggle".