The Choro Q video games are a series of video games based on Takara's Choro Q toy cars (also known as Penny Racers in English-speaking markets). The games have been localised for Western release under many different names, including Gadget Racers, Penny Racers and Road Trip.
Most of these games were developed by external companies, although they are usually credited to Takara since the developers' name rarely appears outside of the ending credits. Some of these developers include Tamsoft (Choro Q, Choro Q 2 and Choro Q 3), Barnhouse Effect (Shin Combat Choro Q, Choro Q HG and Choro Q HG 4), E-game (Choro Q Wonderful, Choro Q HG 2 and Choro Q HG 3), Electronics Application (aka Eleca) (Choro Q Advance, Choro Q Advance 2, Choro Q: Hyper Customable GB and Perfect Choro Q). Most are auto racing games with extensive opportunities for customisation, often including role-playing video game-style elements such as towns and side-quests.
Only three games in the series were released outside of Japan prior to 2001 (including the 1984 MSX game by Taito Corporation, which is unrelated to the later Choro Q titles) - Choro Q for the PlayStation (released in Europe only as Penny Racers) and Choro Q 64 for the Nintendo 64 (released in North America and Europe as Penny Racers). However, since 2001 many of the titles have been released in the US and PAL regions as budget titles, by publishers including Conspiracy Entertainment, Midas Interactive Entertainment and Play It!.
Source: Wikipedia, "Choro Q video games", available under the CC-BY-SA License.