I’ve read the old Kellogg’s and General Mills catalogues, so I can share a few facts. Tony the Tiger was launched in 1952 for Frosted Flakes, the first mascot to be animated in a commercial series. Lucky the Leprechaun came a decade later, in 1965, to promote Lucky Charms, and his green suit and clover‑shaped cereal pieces were an early example of a product linked to a specific mythical character. The “Snap, Crackle, Pop” of Rice Krispies, introduced in 1939, was never tied to a single mascot, but the sound itself became a brand identity. In the 80s, cereal ads leaned into hyper‑colorful, fast‑cut visuals that matched the era’s music videos. That rhythm you’re thinking of—those ads were literally trying to feel like a beat, with quick cuts and jingles. If you’re remixing them, you’ll find the original soundtracks were often simple three‑note motifs, designed for easy recall. Those little characters were a way to give the cereal a personality, making the bite itself feel like an experience. That’s the backbone of the “crunch” you’re looking for.