How to get Extra Vivosaurs?

Just experiment is all I can say I generally use one main attacker in the attack zone and two vivosaurs with good support effects in the support zone(I don't have specific vivosaurs in mind at the moment).
For saurhead3rd take out guan as quickly as possible,for saurhead 2nd just have a good fire type, for saurhead 1st force brontoth in the escape zone if you can't take it out quick enough, for Vivian try to force angato out of the attack zone if you can't take it out while the other two are annoying they aren't much more that, Rex takeout the sloth before it confuses you, for snivel just have a good fire type on the team and you should be fine. To unlock raptin and duna you have to collect all 100 vivosaurs not much to say except their is a guide on game FAQ that tells you what digsite each vivisaur is found in. Dynal is the hardest what you need to do is have fregi and two support dinos that can negate the accuracy drop and increase your damage output and have fregi use cold ice to take out duna and raptin simultaneously.