Slightly "POWER-ful! ! !" to fit the portable system
The PSP version is nothing short of different in the Dreamcast's version... The PSP has both the 2 Power Stones in one neat package... Good part is all characters could play in any areas of both games (ex: Accel can be playable in Power Stone 1 now, The 2 bosses in Power Stone 1 are playble in Power Stone 2... etc...) of course... you must complete a certain goal to unlock them... and new items are added for the PSP re-release... I also hear problems with the Loading times but that wasnt that much of an issue for for Power Stone 2 but its a different story for Power Stone 1
Bad thing is... not much has changed... even if the gameplay was still intact... There are problems... Characters that were imported from the games (Kracken and Valgas from Power Stone 1 and the 4 new Characters from Power Stone 2) weren't fixed to fit the other's gameplay... therefore some moves are usually a disadvantage... or like Power Stone 2's large line-up of items available... i cant seem to be able to use or find some of them in battles... Strong Items like the 5-barrel Shotgun or even the Petrifier is sort of uncommon or rare from time to time... (Imagine on how that will affect the Meteor or Dragon Slayer)
Having both games are great... but adding new, more interactive maps would prolong the game... Still... Capcom did good to be able to port both games to the PSP