Which of these was the first major brand mascot created specifically to exist only in digital form, never intended to have a physical presence?

Brand mascots have evolved dramatically through the decades - from simple illustrations to animated figures to complex digital personalities. In the 2000s, one major company made advertising history by creating the first significant brand mascot that was intentionally designed to exist only in the digital realm, never appearing in physical form. This innovation represented a shift in how companies approached brand representation in the increasingly digital marketplace. Can you identify this groundbreaking digital-only mascot?

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Clippy (Microsoft Office Assistant)
The GEICO Gecko
M&M's Characters
The Energizer Bunny