This thing I guess:
http://www.ebay.com/itm/Turbo-Duo-Super-HuCard-Best-Hits-Bundle-121-Games-Legendary-Axe-With-Others-/272613645045?hash=item3f790a1af5:g:2pMAAOSwB-1Y30Xx
"This is sorta a best of its 121 games on one disc. This was a home made reproduction and I would pass along a list of games but you'll see even the guy who made it put football for fhfxyfc etc in Japanese if it's football etc. You won't be disappointed. Message me with any further questions."
I wasn't aware something like this could even work (to be fair, there is a lot I am unaware of)?
I wasn't too familiar with this either BITD (I never used it and I didn't follow any discussions about it when it was being developed), but it was an example of an early "proof of concept" by one of our own tech gurus.
This project stopped because it was just a proof of concept and each ROM had to be manually configured (coding skills required).
Somebody will punch me for not remembering who implemented the idea (Bonknuts?), but it basically comes down to this:
A few CD-ROM games boot up HuCARD ROMs (Neo Nectaris can boot Nectaris, the 3-in-1/4-in-1 Gate of Thunder can boot Bonk 1 & 2 & Bomberman)...so, if you manually configure a HuCARD's ROM to run at specific memory addresses (and no unorthodox techniques/mappers are being used by the HuCARD ROM), you can get some games working.
The caveat is that this requires programming skills, each game must be manually configured to work, and not all HuCARD ROMs are viable candidates.
For example, I don't think SFII' (mappers) would work on this without extensive coding.