Downshift from Cybertron's case, he was very obviously somebody else. Though depending on what story whatever Hasbro rep gave you, he was Downshift. Despite his naming causing a few headaches, the character got a great toy in Energon which was followed by an even better toy in Cybertron. That's what I'm focusing on here, a really great second toy of a character who isn't who all appearances would lead you to believe, but somebody else.
Downshift's new toy was pretty much one and done in Cybertron, though by the magic of a hit movie and need of as much products on shelf NOW, the mold was reused as part of Walmart's really cool 2007 movie exclusive set of figures.
Big Daddy was a new version of the Micromaster character who by that time had obtained a good bit of fandom love. This new figure managed to utilize the wonderful car mode of the mold as a really great homage to the original character. The black and orange really looked sharp and the car looked awesome. Unfortunately this great toy mold saw no other use.