But all the beyblades related to myth
Joker: there are literally tones of jokers in mythology - https://en.wikipedia.org/wiki/List_of_fi...tricksters
Knight: Knight can be debated as it is a career in medieval times but it is also used in mythology i.e. the black knight(Welsh Mythology), knights of the round table(Arthurian legend)
I’d like to add in that some of those websites are fan created and not reliable sources of information. Wikipedia is not reliable either. It’s best to just not create false info like that. Regulus is called Regulus because it is named only after the star itself. Its avatar is a lion because the symbol of the Leo constellation is a lion. It has nothing to do with the Nemean lion.
I noticed that the info you put down on Phi's page is copied nearly word for word from the Beyblade Burst Nightmare Fuel and Characters TV Tropes pages. Please try to be creative and use your own words in the future.