Dragonite/Gyarados/Charizard HP?

[marioware2]

I have seen a lot of people who say that these HPs would be good on these pkmn:

Dragonite
Flying (why flying HP over aerial ace?)
Rock
Ground
Ghost

i dont understand the benefits of most of these.

Gyarados
Ghost
Rock

I still dont get why either of those would help.

Charizard
Flying (again, why over aerial ace?)
Rock
Dragon

im training all three of these, and i dont really understand the benefits of these HPs. if someone could help, thatd be great. thanks!

[touched]

they all use hp flying because they get stab
hp fly > aerial ace because it has 70 bp as opposed to 60
draggy does not need any other HPs because it can learn superior attacks of those types
charizard can learn dclaw and rock slide so no need for hp rock/dragon
gyarados occassionally uses hp rock because it can deal more damage to some things it normally wouldnt, like zapdos

[marioware2]

yeah i pretty much understood that part,

what i didnt get was why people would suggest all of those?

i mean you pretty much told me there wasnt a need for them, so im wondering why people would use them.

especially ghost.

[touched]

hp ghost isnt necessary on draggy or gyarados because a DD hp fly would suffice to take care of mostly anything that hp ghost would have.
people who want hp ghost on them probably dont understand that concept.

[marioware2]

thx. i dont think youd even need dragon dance, with the STAB its almost equal. it was just puzzling, ghost isnt that great a type anyways, i was just wondering why people would want it.

thx for ur help!

:)