This occurs in a Japanese toy line, animated series, and mobile video game called Q-Transformers. Specifically, the video game is called Q-Transformers: Mystery of Convoy Returns. Both Bumblebee and Optimus Prime are able to switch between their Generation 1 and movie modes in the series and game-- specifically Q-Transformers: Mystery of Convoy Returns. Strangely, though, when he’s in Generation 1 mode, he’s not a Volkswagen but another small, quirky car: a Daihatsu Copen. The show is pretty meta, with the characters being aware that they’re toys and they even talk about the Mystery of Convoy video game that they’re in.
Part of the first wave of TakaraTomy Lost Age: Movie Advanced toys, this Japanese-exclusive redeco of 2007 Transformers Protoform Optimus Prime is given a Generation 1-styled color scheme (which is also based on his appearances in IDW's Transformers: Foundation comic-book mini-series). Protoform Optimus Prime transforms into his "entry" mode. This mode somewhat resembles a cybertronic truck, with false wheels sculpted onto the sides, and Optimus Prime's trademark windows in front. His now-blue flame decoration piece fits to the back of the "vehicle", creating the illusion of a flaming comet's tail (Not sure if this was mean to represent his jetpack blast effect or his atmospheric entry heat effect, which is for no reason: entirely blue instead of hot red). The bottom of the vehicle has small wheels to roll the toy across smooth surfaces.