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.

Sounds like a fascinating blend. Just keep an eye on the original copyright dates—those jingles were copyrighted long ago, and the mascots themselves are still protected. If you can find the public‑domain elements or clear the rights, you’ll avoid a lot of headaches. And remember, the mascots weren’t just characters; they carried messages about nutrition and optimism, so keeping that spirit can add depth to your synth wave. Good luck with the crunch!