Claim: Ring ni Kakero's second season started with the 13th series titled "Start! Golden Japan Jr." and ended with the 24th series titled "Black Flash".
Evidence: Season No. 24 "...And So the Boy Flies to the World"
"Soshite Shounen wa Sekai e to Habataku" (そして少年は世界へと羽ばたく) 
23 "Black Flash"
"Kuroi Senkou" (黒い閃光)