The DS version (FF VI Advance) is supposed to be a lot easier than the PS one. I can't remember where I got Umaro from either. There are 14 playable characters though.
That move is standard
Fight. But I have the relic Genji Glove which allows both hands to hold a weapon and the relic Offering which changes Fight to X-Fight, which means each time you select Fight, it does it 4 times. So when you press fight it attacks with both weapons, then does it 4 times
Means it attacks 8 times rather than once. Unfortunately they are the 2 most powerful weapons in the game and not doing a whole lot of damage at level 80 or whatever he is.
It's quite funny when you end up doing ~60,000 damage and they only have around 1,000 HP.
No card game in 6 though
But I have got over 1.5million GP (Gil in the newer games). Supposingly you can complete the game in under 6 hours 30. I'm at 77 hours at the moment, although it only took around 30 hours the first time, but I did leave it on while having dinner etc.