Characters that are crossed out are taken, and if you want to join as a character that isn't listed, you can, as long as you can prove that the character is an actual dbz character, or you make it a custom:

Character List
Saiyans:
Bardock
Brocco
Broly
Chishan
Daizu
Diive
Fasha
Goku
Kid Goku
Nappa
Paragus
Panboukin
Pumpkin
Raditz
Toma
Totepo
Turles
Vegeta
Kid Vegeta
King Vegeta
Custom (0/2)

Half-Saiyans:
Future Trunks
Future Gohan
Gohan
Teen Gohan
Kid Gohan
Goku Jr.
Kid Goten
Teen Goten
Pan
Bra
Chibi Trunks
Teen Trunks
Vegeta Jr.
Custom (0/3)

Androids:
Android 8
Android 13
Android 14
Android 15
Android 16
Android 17
Future Android 17
Android 18
Future Android 18
Android 19
Android 20
Rilldo
Custom (0/3)

Bio-Androids:
Bebi
Cell
Cell Jr
Custom (0/3)

Humans:
Bulma
Chi-Chi
Chaoutzu
Krillin
Master Roshi
Spopovich
Tao Pai Pai
Tien
Uub
Valese
Videl
Yajirobe
Yamcha
Yamu
Custom (0/3)

Demons:
Dabura
Garlic Jr.
Janemba
Hildegarn
Majin Buu
Majuub
Super Buu
Kid Buu
Custom (0/3)

Changelings:
Cooler
Frieza
King Cold
Custom (0/3)

Namekians:
Kami
Lord Slug
Demon King Piccolo
Piccolo
Nail
Dende
Custom (0/3)

Aliens:
Bojack
Burter
Ginyu
Gokua
Guldo
Dodoria
Jeice
Minosha
Kui
Appule
Pikkon
Reecoome
Sauzaa
Tapion
Spice
Vinegar
Zarbon
Zangya
Custom (0/2)

Kais:
Supreme Kai
Kibito
North Kai
South Kai
East Kai
West Kai
Custom (0/3)