(See the best response by Tiberath.)
on people favourite i see dbz games or db and so on
Best response
I'm not quite sure what you're asking. If you're looking to find them, you ultimately shouldn't be able to.

The answer to why the majority of DBZ games on BYOND aren't findable is in the Fangames forum:

Lummox JR wrote:
This is a short, but not exhaustive, list of properties we have been told we cannot list on BYOND:

Dragonball (owned by FUNimation)
Final Fantasy (owned by Square Enix)
One Piece (owned by FUNimation)

This means Funimation has contacted BYOND and requested they remove all DBZ related games or risk lawsuit.