36. Ken's voice actor Gabe Khouth was his finale anime role which may explain why Ken hasn't shown up in the other seasons

37.Ken is 4'11 in Burst

38.Rantaro is 11 in Burst and 15 in Sparking

39. Rantaro is 5'2 in Burst and 6'0 in Sparking

40.The books in Rantaro's pants in burst are all Coro Coro comics