To understand the disparity, you need to know the history. Bakugan was produced by TMS Entertainment and Japan’s Dentsu. When it was localized for North America, the rights were picked up by (not 4Kids, though Nelvana applied similar localization tactics).
Each script is a living entity. The English dub scripts are loud, bright, and simple. The Japanese original scripts are heavy, bleeding ink, whispering traumatic backstories. bakugan battle brawlers japanese dub english subs
Watching with English subtitles allows you to see several elements that were censored or changed for the English release: To understand the disparity, you need to know the history