So, I'm leaning towards this as my main team. Does anyone have any objections or advice?

Your team has a bad chance against a ground type...at least 3 of them & what ability will have cause in it's case it matters most when matching it up to other types. Also if your playing platinum...I'd be sure to have something to deal with Flint's fire type party like having a water type move that does at least 60-70 base damage. Keep Chrunch on either or . You need to be a little bit more specific on exactly what kind of advice you want with this before I can help you any further.