MF earth bull 145 sd Actually, there is no best. every Beyblade can be beaten by another. I don't know the best, but I'll tell you a pretty good one. It's my best combo so, here it is: Thermal Aquario 105 AS (stands for around sharp, it's better than WD, SD and W2D).
It ultimately depends on personal preference and playstyle. Gravity Perseus is known for its defense and stamina capabilities, while Fang Leone is known for its attack and aggression. Consider your own battling style and the strengths and weaknesses of each beyblade when choosing between them.