there all home made,there is a giant community of people that share all their created characters/rings/titles then release them online in different "edit packs" virtually every wrestler is available somewhere, hence the nes pro wrestling edit pack, they ve even been able to make their own moves too, so you can download triple h, then download the pedigree to complete the character
edit: the reason i origianlly asked you about fp is the the first fp always reminded me of pro wrestling for nes:
http://ca.youtube.com/watch?v=ax_RRxKzya0