Here are 3 different plastic keychains. These are likely to all be from a set of them, as you can see by their identical packaging style. (A flat card with Sonic simple line-art imagry, always in orange & in a clear baggie) Each keychain also features a shiny sparkle foil-substance that the graphics are printed on to give the keychain a shiny effect. The first is made to look like a strip of old-fasion film-negative material. It has thumbs-up Sonic, with different line-art scenes in the background. The second has a brick-wall pattern over a gold-tone version of the foil so that Sonic & Tails can look like they're leaning against it. The third is round with thumbs-backward Sonic in a red ring of stars. Each has the Sega logo fairly large & the "Segasonic" branding, so they're likely from right around the time of Sonic2.