For a full (at least I think it is) list of the changes made from the PSP version of Disgaea you can check it out here: http://disgaea.wikia.com/wiki/Disgaea:_ ... f_Darkness
As far as I know, Disgaea 2: Dark Hero Days has had the most notable amount of changes and additions without a resulting 'give and take' mantra that Disgaea: Afternoon of Darkness suffered from.
Still a shame that the Americanised version of D2:DHD didn't get Dark Eclair, Gig and Miabel as DLC which was available to the Japanese PSN.
It would've made the game just that bit more enjoyable but thankfully they decided against loosely placing them in due to all the glitches and bugs these characters suffered from.
As far as I know, Disgaea 2: Dark Hero Days has had the most notable amount of changes and additions without a resulting 'give and take' mantra that Disgaea: Afternoon of Darkness suffered from.
Still a shame that the Americanised version of D2:DHD didn't get Dark Eclair, Gig and Miabel as DLC which was available to the Japanese PSN.
It would've made the game just that bit more enjoyable but thankfully they decided against loosely placing them in due to all the glitches and bugs these characters suffered from.