In Fossil Fighters when you Fight Bullwort the second time what vivosaurs should you use

You have to use Ignosaurus. I would advise using an Wind type and a water type. I personally used my Spinax and my Futabi.

Once again, I have to correct people who think you can only use Igno for this battle.
Ask a friend to transfer a Guan, T-Rex, and a Orno into your game via Fossil Cannon. This way T-Rex can become powered by Orno and Guan in the SZ who will double T-Rex's accuracy and attack power. T-Rex should be able to hit Frigi with an enormous amount of strength. This works as usual. -DeniedGrox