You technically could do a draft with more or even fewer players, but the vast majority of your Draft experiences will be with six or eight players
Heres my history with Magic: The Gathering : I played it compulsively about 20 years ago, until I ran into That Guy, who had narrowed the total focus of his life down to building intricate lawnmower decks that would destroy other players four to six at a time
The issue is exacerbated when going against opponents with a deck that focuses on using enchantments or artifacts, and you will need more than the small number of cards available to black, like Feed the Swarm and Ghastly Death Tyrant.
Heres the full gallery of images from the base set: Paradise Dragona: Base Set Card List With the cards in the above gallery being in Japanese, and with only some of them being recognisable Pokemon, its useful to know the name of each card in English
Its a blast to play if you like casting lots of spells, drawing cards, and watching your little army grow into an unstoppable force