| No. | Champion | Reign | Date | Days held | Location | Event | Notes | Ref. | 
|---|
| 1 | Pierroth Jr. | 1 | 000000001997-09-28-0000September 28, 1997 | 7002672000000000000♠672 | Naucalpan, Mexico | IWRG live event | Defeated Black Magic in the finals of an eight-man tournament. | [2] | 
| 2 | Pirata Morgan | 1 | 000000001999-08-01-0000August 1, 1999 | 7002114000000000000♠114 | Naucalpan, Mexico | IWRG live event |  | [2] | 
| 3 | Super Parka | 1 | 000000001999-11-23-0000November 23, 1999 | 7001230000000000000♠23 | Yokkaichi, Japan | Live event |  | [2] | 
| 4 | Scorpio Jr. | 1 | 000000001999-12-16-0000December 16, 1999 | 7002731000000000000♠731 | Naucalpan, Mexico | IWRG live event |  | [2] | 
| 5 | Tinieblas Jr. | 1 | 000000002001-12-16-0000December 16, 2001 | 7002256000000000000♠256 | Naucalpan, Mexico | IWRG live event |  | [4] | 
| 6 | Scorpio Jr. | 2 | 000000002002-08-29-0000August 29, 2002 | 7002273000000000000♠273 | Naucalpan, Mexico | IWRG live event |  | [5] | 
| 7 | Enterrador !El Enterrador | 1 | 000000002003-05-29-0000May 29, 2003 | 7002136000000000000♠136 | Naucalpan, Mexico | IWRG live event |  | [6] | 
| 8 | Tinieblas Jr. | 2 | 000000002003-10-12-0000October 12, 2003 | 7002123000000000000♠123 | Naucalpan, Mexico | IWRG live event |  | [6] | 
| 9 | Villano IV | 1 | 000000002004-02-12-0000February 12, 2004 | 7002210000000000000♠210 | Naucalpan, Mexico | IWRG live event |  | [7] | 
| 10 | Scorpio Jr. | 3 | 000000002004-09-09-0000September 9, 2004 | 7002245000000000000♠245 | Naucalpan, Mexico | IWRG live event |  | [7] | 
| 11 | Heavy Metal | 1 | 000000002005-05-12-0000May 12, 2005 | 7002224000000000000♠224 | Naucalpan, Mexico | IWRG live event |  | [8] | 
| 12 | Scorpio Jr. | 4 | 000000002005-12-22-0000December 22, 2005 | 7001410000000000000♠41 ![Note 1] | Naucalpan, Mexico | Guerra del Golfo |  | [8] | 
| 12.5 !— | Vacated | - !— | 000000002006-02-01-0000February 2006 | - !— | - !N/A | - !N/A | Championship vacated when Scorpio Jr. left the promotion. | [9] | 
| 13 | Canek | 1 | 000000002006-05-05-0000May 5, 2006 | 7003144400000000000♠1,444 | Naucalpan, Mexico | IWRG live event | Defeated Rayo de Jalisco, Jr. in a Relevos Increibles, that saw Perro Aguayo, Jr. and Headhunter A against Canek and Jalisco. | [9] | 
| 14 | Mascara Ano 2000 !Máscara Año 2000, Jr. | 1 | 000000002010-04-18-0000April 18, 2010 | 7001670000000000000♠67 | Naucalpan, Mexico | IWRG live event |  | [10] | 
| 15 | Silver King | 1 | 000000002010-06-24-0000June 24, 2010 | 7002479000000000000♠479 | Naucalpan, Mexico | IWRG live event |  | [11] | 
| 16 | Taboo | 1 | 000000002011-10-16-0000October 16, 2011 | 7001700000000000000♠70 | Naucalpan, Mexico | Dr. Wagner 50th Anniversary Show | This was an elimination steel cage Title vs. Masks match, also involving Dr. Wagner, Jr. and La Parka. | [12] | 
| 17 | Headhunter I !Headhunter I | 1 | 000000002011-12-25-0000December 25, 2011 | 7002179000000000000♠179 | Naucalpan, Mexico | Guerra de Campeones | This was a three-way Bullterrier match, also involving Electroshock. | [13] | 
| 18 | Cien Caras Jr. | 1 | 000000002012-06-21-0000June 21, 2012 | 7002584000000000000♠584 | Naucalpan, Mexico | IWRG live event | Won the match and the title via disqualification.[Note 2] | [14] | 
| 19 | Vampiro Canadiense | 1 | 000000002014-01-26-0000January 26, 2014 | 7002161000000000000♠161 | Naucalpan, Mexico | IWRG live event |  | [15] | 
| 19.5 !— | Vacated | - !— | 000000002014-07-06-0000July 6, 2014 | - !— | - !N/A | - !N/A | Championship declared vacant by IWRG due to Vampiro not working for IWRG for an extended period of time |  | 
| 20 | Hijo de Dos Caras, ElEl Hijo de Dos Caras | 1 | 000000002014-07-20-0000July 20, 2014 | 7002448000000000000♠448 | Naucalpan, Mexico | IWRG live event | This was six-way ladder match, also involving Demon Clown, Dr. Wagner, Jr., L.A. Park, Máscara Sagrada and Pirata Morgan. | [16] | 
| 21 | Mascara Ano 2000 !Máscara Año 2000, Jr. | 2 | 000000002015-10-11-0000October 11, 2015 | 7002211000000000000♠211 | Naucalpan, Mexico | Caravana de Campeones |  | [17] | 
| 22 | Hijo de Dos Caras, ElEl Hijo de Dos Caras | 2 | 000000002015-11-01-0000November 1, 2015 | 7002105000000000000♠105 | Naucalpan, Mexico | Castillo del Terror |  | [18] | 
| 23 | Trauma I | 1 | 000000002016-02-14-0000February 14, 2016 | 7001700000000000000♠70 | Naucalpan, Mexico | Live event | Match also included Herodes Jr. | [19] | 
| 23 | Mascara Ano 2000 !Máscara Año 2000, Jr. | 3 | 000000002016-04-24-0000April 24, 2016 | 7001150000000000000♠15 | Naucalpan, Mexico | Live event |  | [1] |