[Solved]-Custom hover / tooltip data on highcharts network chart-Highcharts

You can get the required propeerties through: this.point.options

    tooltip: {
        formatter: function() {
            const { title, other } = this.point.options;

            return 'Title: ' + title + ' Other: ' + other
        }
    }

Live demo: http://jsfiddle.net/BlackLabel/4zgrnqc2/

API Reference: https://api.highcharts.com/highcharts/tooltip.formatter