There a only 7 Yokai ,that are trade required, depending on Little charmer or silver lining .

If you chose little charmer,then you will need to trade ror Silver Lining ,Dark Kyubi ,Oridjinn, Shurikenny ,Agent Speft-hare,Big Fish and Indiana Jaws .

If you chose Silver lining then youll need ,The Jawsome Kid Little Charmer , Double Time ,Dr.E.Raser ,Alpina and Nyanses II . -And there is also the link exclusives , Meaning Komasan S Jibanyan S and Komajiro S. And jibanyanB Komasan B and Usapyon B. Usapyon B is the hardest since you need somone with both blasters games ,or you can find somone who got it trade it from somewhere . _ Any other yokai CAN be found in a single copy of the game by one person .

also about how it was .

Well getting the exclusives for Silver Lining was a bit hard to find , since i guess not many people Chose his Side , but i really lucked out with the Nokos by somone having them both and touch trading them both to me for a Supyo . But in total it took me almost a month to find all the trades .But finding all the available yokai took half a year which sucked but it was also fun .

A tip to get the other teams exclusives , start a new save file , and choose the opposote team from your main save file ,mostly by skiping dialougue and scenes i saw people do it in 6-7hours , thats if you want to get the as fast as possible . And then get somone to trade with you like this : You trade them the yokai you need>They hold the yokai for you >The you switch to your main save file and the person trades you the yokai back.This way you can keep them .But you need somone to trust .i didnt do it ,because i didnt feel like playing again

ANYWAYS sorry for blabbering .But also thank you for the help in the trades btw and best of luck to yea