In Gintama and other anime that parody UC Gundam and Legend of the Galactic Heroes, Char and Reinhart (one of the MCs of the show) are usually combined into one character though Char is a VA in the show (he is the head of the Military Police) it is so great (Reinhart is voiced by Vegeta).
I have also watched Aura Battler Dunbine and I will get to watching Xanbungle, Brain Powered, Turn A Gundam, and Overman King Gainer. I think after that the Tomino set will be for the most part, complete, unless I want to watch the horrible Heidi anime (which is parodied in Gintama) or some episodes he directed for the original Astro Boy. Yeah, Tomino has been around that long.
The original Gundam and also Ideon (which I am about to watch) were cancelled. Both had a huge following after they aired and were revived with movies. They were initially flops. The reason why in the middle of the series we got all those weird MSes was because they were trying to sell toys. Eventually it was axed and that is why it was super rushed at the end (compared to the original slow pacing) again (though for the same reasons) same as Furman. X and the original MSG both are the only Gundams to be cancelled. Why don't you ever hear that X was the first cancelled... well because it wasn't the first to be cancelled, the original already had the dubious honor lol.
This is why Gundam is 43 episodes rather than the full 49.