To most of his fans, Kōji Wada was known for performing nearly all of the theme songs and many other songs for the Digimon anime franchise, but to Transformers fans, he is best known for performing "Honō no Overdrive ~Car Robot Cybertron~" ("Blazing Overdrive ~Car Robot Autobots~"), the theme song to the 2000 Japanese anime series Transformers: Car Robots (known better to the English-speaking world as the first Transformers: Robots in Disguise cartoon from 2001). He also performed "Kimi Iro no Mirai ~Yume~" ("The Future of Your Color ~Dream~"), the c/w song for the single release album of the Car Robots theme song.
Though his contributions to Transformers were few (which can all be found below), he will be missed. Sayōnara, Wada-sensei. May you rest in peace.
TV sized version of "Honō no Overdrive ~Car Robot Cybertron~" - https://www.youtube.com/watch?v=hhoNW0VTJWo
Full version of "Honō no Overdrive ~Car Robot Cybertron~" - https://www.youtube.com/watch?v=CZcIxQGu19s
"Kimi Iro no Mirai ~Yume~" - https://www.youtube.com/watch?v=mXr854awT_8