Motocross Championship happened in 1994.
Motocross Kids was created in 2004.
Motocross Madness was created in 1998.
The prime product developed by Moto Games is motocross video games including Motocross World Championship, Motocross Madness, Freestyle Motocross and X Games.
Motocross - video game - was created in 1983.
Motocross Maniacs was created on 1989-09-20.
Ricky Carmichael is the GOAT (Greatest of all Time) when it comes to motocross. He is the current record holder of the most championship titles throughout a racing career.
There are many large prizes that a pro motocross racer can win each year. The most notable are the X-Games event gold medals and the AMA Motocross Championship.
A Championship was created in 2008.
Blair Morgan, a multiple time winner of the Canadian Motocross Championship, was born on October 8, 1975. He is currently 37 years old, which quite a lot for a motocross racer.
The link below is as close as I can find, it is not a complete list though.
Lithuanian Chess Championship was created in 1929.