You get Sackboy by becoming a level 20 in the alliance, and you get Unicorn by collecting and evolving all of the Invizimals to Max.
It's only on Invizimals (by the way, it's spelled Flameclaw).
u get it after u max all the guardian invizimals and then complete the tornament
go to google,type secret traps for invizimals shadowzone scan,enjoy your new invizimals!
some where arund summer
win any torament
six of them require secret traps other have battles or alliance ranks to get
in the first invizimals you have to google it like:invizimals 1 uberjackal trap and in invizimals shadow zone i think it is by a bet in tailandia(not sure)
U get it by completing ome or two or all of these. One of these are right, I don't know which. 1. Play a certain amount of Player vs CPU matches 2. Win a certain amount of tournaments 3. Level all catchable invizimals to Max U get it by leveling all catchable invizimals to Max :)
Just click on this link and it will tell you everything: What_is_the_big_secret_on_invizimals
You have to Win 20-50 times in online battles
You need to capture FIVE MUTANT Invizimals, it should then do something or other on Infrastructure
There isn't a "best" Invizimal. It just depends on what stats you raise when you level it up. People have different favorite invizimals. Mine is Shenlong.