^Diabolos or somethin i hella forgot. I forgot everything from 10, but the coolest one i can think of is that bad guy one, that nasty ass lookn creature. U guys no what im talkn bout. I seriously forgot all of em except for the ones in 8 and 7.
...but if we counting all summons from all games, I'd probably go with leviathin from 9. or the one from 8, I forget his name, but you get him by fighting him in a lamp. Anyone know who I'm talking about?
i did that a couple years back...played FF 1-9 (and tactics). sounds fun at first but becomes like work after a while,especially when you have beat them all before anyway,starts to become tedius.