I'm not sure but i think aquilamon and gatomon make silphymon, angemon and ankylomon make shakkoumon and exveemon and snimon make i think paildramon
Nanimon, at least at 4 DP.
A LOT> To many to list here; http://forums.supercheats.com/topic.php?topic=74877
It will tell you here: http://www.neoseeker.com/Games/cheats/PSX/digimon2.html (Copy and paste url)
garudamon+blossomon or yatagaramon+ karentenmon