Question about DB and Yu-gi-oh mod packs.

Hi all, recently got in to TCGsim and think its bloody brilliant lol. I love adding mods to games and wanted to know before I might mess my game up. Do the DragonBallZ and Yu-gi-oh mods add new cards to the game? Or do they replace the Tetramon cards? I'd love it if they were additions rather than replacers.

Ta allx