He shared many hardships. Paul mentions him four times at the end of letters, and in each case he sends him to people with news of Paul and the work of the gospel. Tychichus actually carried the letter to the Colossians and the letter to the Ephesians, and Paul says he has now sent Tychicus to Timothy in Ephesus. Probably that means he is carrying the letter to Timothy and will replace Timothy there when he comes to Rome to be with Paul and bring his things to him. Tychicus was above all an encourager.
Christian ministry is more than just communicating the Word of God.
It IS that, but it has a far more personal dimension. Your conduct, your words and the way you say them, your relationships, can have great effects. Tychicus knew this, and he was one who encouraged the hearts of believers. And there is even a lot to learn in Paul's requests for his cloak and books. But I've run out of time, so let me conclude with some gospel principles we can apply.