"Revealing that he was training for a professional wrestling career." - He revelaled
"in the case of Último Guerrero Jr." - in Último Guerrero Jr.'s case.
"it was later confirmed that there was a blood relationship between the two" - It was
Taurus (2011–2013)
All mentions of Jr. in this section of the article should have the comma omitted per
MOS:JR
"Between 2010 and 2011 only occasionally wrestled matches" - Between 2010 and 2011, he only
"Taurus teamed up with his older brother Último Guerrero. The team-up indicated the family relationship as they competed in a for Toryumon Mexico" - competed for a
Toryumon Mexico
"Taurus made his in-ring debut for CMLL on June 18, 2012," - Taurus made his CMLL in-ring debut
"where a rookie and a veteran team up." - pair up for variety?
"a tournament that focuses primarily on younger wrestlers or wrestlers who work in the lower ranks of the promotion," - or those who work in the promotion's lower ranks,
"to earn a spot in the finals the following week against Soberano, Jr." - to earn a finals spot against
Soberano Jr. the following week.
"Taurus would team up with veteran Averno and compete in Block A" - Taurus teamed with veteran
Averno and competed in Block A
Gran Guerrero (2013–present)
"During the celebration of Atlantis' 30th anniversary as a wrestler, Último Guerrero appeared after a match to berate Atlantis," - him
Delink Japanese as the country is a major geographical region
"initially by accidentally causing them to lose matches due to miscommunication" - to a miscommunication
"between Niebla Roja and Euforia and Gran Guerrero." - between Nibela Roja, Euforia and Gran Guerrero.
"and demanded that Niebla Roja had to come up with a new mask" - and demanded Niebla Roja to come up with a new mask
"followed by defeating Dragon Lee and Místico in the finals on the next day." - followed by beating
Dragon Lee and
Místico II in the next day's finals.
"Los Guerreros Lagunero ended Sky Team's 1,223-day reign with the CMLL World Trios Championship as they defeated the Sky Team" - them
Personal life
"It is traditional for an enmascarado to keep their private lives a secret from the wrestling fans," - to conceal their private lives from wrestling fans,
Championships and accomplishments
A reliable citation to the claim of FMLL Tag Team Championship (1 time) – with Último Guerrero is lacking here
References
References 9, 10, 15, 16, 19 are lacking the authors of their respective works
References 4, 15 and 30 are missing their translated titles
The trans-title in Reference 26 is not correctly formatting and requires attention
Reference 28 is incorrectly formatted and needs proper work on it
"Revealing that he was training for a professional wrestling career." - He revelaled
"in the case of Último Guerrero Jr." - in Último Guerrero Jr.'s case.
"it was later confirmed that there was a blood relationship between the two" - It was
Taurus (2011–2013)
All mentions of Jr. in this section of the article should have the comma omitted per
MOS:JR
"Between 2010 and 2011 only occasionally wrestled matches" - Between 2010 and 2011, he only
"Taurus teamed up with his older brother Último Guerrero. The team-up indicated the family relationship as they competed in a for Toryumon Mexico" - competed for a
Toryumon Mexico
"Taurus made his in-ring debut for CMLL on June 18, 2012," - Taurus made his CMLL in-ring debut
"where a rookie and a veteran team up." - pair up for variety?
"a tournament that focuses primarily on younger wrestlers or wrestlers who work in the lower ranks of the promotion," - or those who work in the promotion's lower ranks,
"to earn a spot in the finals the following week against Soberano, Jr." - to earn a finals spot against
Soberano Jr. the following week.
"Taurus would team up with veteran Averno and compete in Block A" - Taurus teamed with veteran
Averno and competed in Block A
Gran Guerrero (2013–present)
"During the celebration of Atlantis' 30th anniversary as a wrestler, Último Guerrero appeared after a match to berate Atlantis," - him
Delink Japanese as the country is a major geographical region
"initially by accidentally causing them to lose matches due to miscommunication" - to a miscommunication
"between Niebla Roja and Euforia and Gran Guerrero." - between Nibela Roja, Euforia and Gran Guerrero.
"and demanded that Niebla Roja had to come up with a new mask" - and demanded Niebla Roja to come up with a new mask
"followed by defeating Dragon Lee and Místico in the finals on the next day." - followed by beating
Dragon Lee and
Místico II in the next day's finals.
"Los Guerreros Lagunero ended Sky Team's 1,223-day reign with the CMLL World Trios Championship as they defeated the Sky Team" - them
Personal life
"It is traditional for an enmascarado to keep their private lives a secret from the wrestling fans," - to conceal their private lives from wrestling fans,
Championships and accomplishments
A reliable citation to the claim of FMLL Tag Team Championship (1 time) – with Último Guerrero is lacking here
References
References 9, 10, 15, 16, 19 are lacking the authors of their respective works
References 4, 15 and 30 are missing their translated titles
The trans-title in Reference 26 is not correctly formatting and requires attention
Reference 28 is incorrectly formatted and needs proper work on it