2 quick questions about character creation:

1) It says no transformations by anyone, does this mean that all Saiyan characters have to be tailless so they can't transform into the Great Aape?
2) Being that my characters that i have in mind are very much loyal to the Saiyan Empire, would my characters be allowed to show up on earth when Vegeta arrives and fight on his side? Considering that the Earth has a lot of protectors, he may just need the back-up on this one.