There are 4 types in beyblade: Attack , Defence , Stamina and balance.
Attack Either Ko's its opponent or depletes its spin totally, but it have low stamina thats why it must beat the opponent quickly. Examples of attack types are, Storm Pegasis 105Rf and Lightning L-drago 100Hf.
Defence just stays in the middle of the stadium and can withstand a lot of blows, also it have moderate stamina.Examples of defence type are, Rock Leone 145Wb and Rock Aries Ed145b.
Stamina too stays in the middle of the stadium and can take in moderate blows , but has plenty of stamina. Examples are, Flame Libra T125Ed and Burn Phoenix 135Ms.
Balance is just a mix in everything but in other to gain you need to sacrifice some, thus if it versus a more concerntrated type, it will lose. Examples are Dark wolf Df145Fs and Killer Germios Df145Fs.