Yeah if you want malboro tentacles you can mod them from cards. It is not possible to meet them (malboros) in disc2.
It is possible to meet them in Island closest to heaven/ Island closest to Hell.
Or if you want tentacles you can also do it in early disc3 south of esthar city.
Since now you are in disc2 I can teach you a trick to draw one of the best spells in the game. Get Tonberry King (I presume you know how to acquire it). Equip the GF to someone. Be sure to have the command LV UP, LV DOWN and DRAW on the character that you have equipped it to. Equip Mag +??% to two characters. Go outside Edea's orphanage house. Wander around the forest nearby. When you have encountered a Ruby Dragon (It will take some time!) , kill off one of your characters (the unequipped one). Start LVLing up the dragon...... and draw Meteor and Flare! (using both your chars). Be sure to heal them (your chars) often.
Escape/ Kill the dragon after you are satisfied with your spells. Do this twice/thrice, and you should have stocked 400-600 Meteors and Flares.