It 's a pinball game based on PokÃ mon Red and Blue , and like those games , it requires the player to find and capture all 150 PokÃ mon to fill the PokÃ dex . PokÃ mon Pinball has a secondary objective hinted at by the tagline `` Gotta Catch 'em All , '' which is to collect all 151 PokÃ mon to fill your PokÃ dex . The PokÃ dex is saved between individual games , so it can be built up over time .