Battledome Challenger List
Brain Tree
Complete his quest
Count Von Roo
Be at the defence shop at 6:00 NST
Edna
Complete her quest
Esophagor
Complete his quest but make sure you're not already doing the Brain Tree quest
Fire Faerie
Select her and win in Gormball
Grarrg
http://www.neopets.com/prehistoric/townhall.phtml
Island Shopkeeper
http://www.neopets.com/objects.phtml?type=shop&obj_type=21
Kauvara
http://www.neopets.com/neopedia.phtml?neopedia_id=9
Magnus the Torch
http://www.neopets.com/prehistoric/volcano.phtml
Mummy
http://www.neopets.com/halloween/mummy.phtml
Pant Devil
Have something stolen by him, either by random event or the wheel of excitement
Ryshu the Nimmo
http://www.neopets.com/neopedia.phtml?neopedia_id=13
Sabre X
Random event in Tyrannia
Shadow Usul
Random event
Snowager
Try to steal something from him and be blasted by him
Snow Faerie
Complete one of her quests
Spider Grundo
http://www.neopets.com/evil/showcreature.phtml?pos=15
Ghost Lupe
http://www.neopets.com/neohome.phtml?type=neighbourhood&location=0&street_name=4&street_number=131
Cave Chia
http://www.neopets.com/prehistoric/painting2.phtml