I'm jealous.
Firstly Skiddo is awesome and secondly I never got the hang of getting a shiny via Pokeradar.
It was this video that taught me the tricks for it… Well this and its predecessor but the info given in this one (namely, the "listen to the sound the grass makes"-bit) that finally allowed me to get to that chain of 40. Or, well, I stopped after defeating #39 and started just spamming the Radar until I saw a shiny patch of grass, as I didn't know if it was the rate maxing out after beating 40, or if it was the 40th that would have the maxed out chance.
Vaguely related, I always have to shake my head whenever I see these Shiny-hunting guides and they're all "Remember to stack up on ULTRA-BALLS". It's like… dude. Especially with PokeRadar-chains, Ultra-Balls are not even close to the best option. Bring Quick-Balls and Repeat-Balls I say. And if you're chaining something you haven't caught before... Just catch the first Pokemon you encounter in the chain, that still counts for continuing the chain.