Applying a different theme to a specific Kendo UI widget on the page is possible, but not supported or documented. The following forum post provides guidelines on how to achieve it.
Point 3 is not applicable to the Grid itself. However, it may be applicable to other Kendo UI widgets inside the Grid.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items