I am afraid your scenario is not supported out-of-the-box by Kendo UI Chart. As a possible workaround I can suggest you to set tooltip animation duration to 0. For your convenience here is a simple jsBin example which demonstrates the suggested approach in action.
Please keep in mind this is a workaround and I cannot guarantee it will work with future versions of the framework.
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI