okay i will just go through the list for the gfs
siren- draw from that thing on top of the radio tower
diablos- defeat him in that magic lamp
laversomething ( see snake creature)-draw from norg
alexander- draw from edea
brothers- in the tomb of the unknown king
pandrsomething ( bird creature)- draw from fuijin when you first verse him
cerberus- defeat him
eden- draw from ultima weopon
doomtrain- collect all the its and somon him
tonberry- defeat about 18-20 tonberrys then defeat the tonberry king
cactuar- defeat jumbo cactuar