Cards
Kane's Card: Defeat Kane with Max. (main character)
Bleu's Card: Speak to Karin after Kane is defeated.
Yogurtss Card: Search the controls of the caravan in Pao
Kokickis Card: Talk to Kokichis helper after he flies off of the cliff.
Dians Card: In the Pao Pig Pen in Pao
Maxs Card: Beat the Game
Marionettes Card: Gort must kill a Marionette
Amons Card: Balbaroy gives it to you.
Gongs Card: Talk to the woman inside Gongs hut.
Domingos Card: In the second Pao Pig Pen.
Vankar's Card: Speak to Vankar 3 times in the headquarters.
Pelle's Card: Speak to Pelle 3 times in the headquarters.
Guntz' Card: Speak to Guntz 3 times in the headquarters.
Earnest's Card: In a bookshelf in the upstairs of the fortress before the battle agains Balbezack.
Narsha's Card: Frequently talk with Narsha in the headquarters.
Zuika's Card: Frequently talk with Zuika in the headquarters.
Lyle's Card: In Reido, exit the town gate but stick to the left side of the screen. You can walk around the outside of the wall and find a chest in the upper left hand corner of the town

Yogurt
Go to the back of the church when you first enter Pao and search the back wall. Yogurt will get up from his nap and join your party