The Dragon Ball series has been absolutely iconic series spanning 575 episodes in the mainline series and over 20 films. This doesn't even include the non-canonical Dragon Ball GT. With so much media to watch for the series, not to mention countless volumes of manga to read, it may be hard to know the watch order for Dragon Ball at all, let alone being able to see it all.
However, even among the most dedicated fans, one particular OVA for the series has gone mostly forgotten. It not only has a moment where Goku travels back in time to meet his younger self but was part of an obscure game console that many don't know outside of Japan. It also builds up the story of what happens in the ten days prior to the Cell Games and was worked on by Akira Toriyama himself making its forgotten status all the more unfortunate.
Related: How To Get Into Dragon Ball: Everything You Need To Know About The Anime & Manga
Translated to Dragon Ball Z: Gather Together! Goku's World in English, the OVA was exclusively released on VHS in Japan making it hard to come by these days. As a unique piece of Dragon Ball media, copies tend to sell for hundreds of dollars to collectors when they appear on auction sites.
The VHS was meant to be used with the Bandai Terebikko, an obscure console released in Japan back in 1988 that was responsible for many other series receiving special OVAs including Sailor Moon and a special Super Mario anime game. The system was entirely unique, using sounds played from the VHS on the television to interact with the «telephone» that made the console. Players could listen to «calls» from some of their favorite characters and help answer multiple-choice questions using the buttons on the phone.
The Terebikko would eventually be
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