I am afraid what you would like to achieve is currently not supported in Kendo UI Chart - there is no event which fires when the axes' labels are hovered. If you wish you can share this idea as a feature request at our UserVoice portal - this way the community would be able to evaluate it and if the suggestion gains popularity we will consider its implementation. The more votes the suggestion collects, the higher priority will have.
the Telerik team
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