Then assuming you're cool with using some 3.x in your pathfinder, crack open Book of Vile Darkness and max out Knowledge Religion.
Sacradiablo
Aasimar Witch* X(If x=7>/Demoniac [Mazmezz] Y)
For Aasimar, you want the variant feature which gives +4 to Kn.Religion checks, and you choose Mazmezz.
For Witch, toss Hexes out the window and take either the Physical Exemplar, Weapon Champion or Youxia archetype.
- Phys. Exemplar increases hit points, a physical ability score, and gives bonus feats which can't boost spellcasting/mental stuff, this is good for a luchadore.
- WC gives you a weapon training group as a fighter (take close or natural), and bonuses when using a weapon from that group (+1 to CMB or CMD with weapon, or +1 to confirm crits at every even level, for example, and stacking +1 shield bonus, +1 attack and damage, or +1d4/6/8 on crits- depending on crit multiplier, at 3rd and every four levels after)
- Youxia makes you a nonsucky monk/ninja witch, giving you half class level on CMD with a chosen weapon (obviously unarmed), and a Ki Pool you can use to do things like add +4 to caster level when casting a spell, add d6s to his wushu weapon, use lay on hands, add +4 TO ANY SKILL CHECK as a swift action, gain half class level+2 as an armour bonus, play Dalsim and make ranged punches, or treat literally any weapon--folding chairs, anyone?--as his wushu weapon if he has at least one ki point remaining.
For Demoniac, assuming high enough level, you choose Mazmezz, as her obedience (strain against chains and bindings for 1 hour) is flavourfully important, and grants +4 to grapples and CMD. If Demoniac 3, her first boon is "animate rope 3/day, web 2/day, or snare 1/day."
Skills: Max out K.Religion.
Feats: Sacrificial Mastery (BoVD) for +5 on Sacrifices, Scholar for +2 on two chosen knowledges (+4 if the knowledge is rank 10+), Skill Focus (K.Religion) for +3.
Assuming the character is 6th level, that's +16 on Kn. Religion checks for pre-match sacrifices. If they're 8th level or higher, Demoniac makes Kn. Religion a class skill, add 3 on top of increased ranks, making it +21. If he's a Youxia witch, he can add +4 on top of that.
Oh, and buy a sacrificial knife, but make it gloves or something, for a +3 competence bonus to Kn. Religion and +1 unarmed attacks. Or increase the skill bonus to whatever he can afford (bonus squared x 100gp)
Now, the point of all this is to use the Sacrifice rules from BoVD. Basically, you perform a ritual sacrifice, racking up as many of the untyped bonuses from sacrifice elements as possible, to get the highest bonus on a Kn. Religion check made when you perform the ritual possible.
So you make the ceremony last at least 1 hour (+1), perform it on an alter (+2), in an unhallowed area (+2), in front of more than 100 followers (+1 for more than 10 and +1 for more than 100). Then you also say that this guy has a following of loyal fans which he pulls sacrifices from. He selects only the most pure and virginal (+1) to show their skill wrestling demons in his gyms (which are actually temples and he has like 5 spread across Ptolus*. The demons cripple the fingers, toes, hands and feet of the would be sacrifices, for another +1, every fractional 5 HD of the sacrifices gives +1 to the sacrifice). If you say that he pulls these followers from a race or type of character Mazmezz hates, then there's another +1. But most important, is that these followers find it an honour to be sacrificed by the luchadore, thus are genuinely willing, and grant a +3 bonus to the roll. For the sixth level version, that's +30 before he would even roll. Because he's an NPC, just say he takes 10, it's more than enough.
The reason you do all this, besides it being kind of awesome, is because a ritual celebrant gets spell effects for successful sacrifices:
check result | effect
|
15 | Aid, Bulls Strength, Cat's Grace, or Endurance for 24 hours
|
20 | Divine Favour (CL 20) or Protection From Elements; or Bless upon 1 witness/victim HD for 24 hours
|
25 | Magic Vestment (CL 20), Divine Power for 24 hours; or an Evil Outsider's services as lesser planar ally for 1 hour/victim HD
|
30 | Greater Magic Weapon (CL 20) or Spell Resistance (CL=Celebrant level); a DC 15 effect on 1 witness/victim HD; or an Evil Outsider's services as planar ally for 1 hour/victim HD (hello Efreeti wishes)
|
35 | A DC 25 effect on 1 witness/victim HD; An Evil Outsider's services as Greater Planar Ally for 1 hour/victim HD
|
40 | Limited Wish or a DC 30 effect on 1 witness/victim HD
|
45 | Control Weather (DC 20) directed by celebrant (could be cool for a special match) or Wish (only once/celebrant ever)
|
Varies | psuedo-XP or Gold for item crafting equal to DCx3 or DCx5, respectively. |
A patron will generally only grant one effect per day per temple. This is why he has five gym-temples throughout the city, so he can walk into the ring with Divine Power, Magic Vestment, Greater Magic Weapon, and whatever else you want up.