your best bet would be to play minigames, such as soul wars or pest control. Using any combat skills will get your hitpoints up. You can also use genie lamps, quest rewards, etc to train your hitpoints.
find something easy to kill with a lot of hp.
It varies randomly. Most of the time nothing happens, sometimes it takes a hp away, and occasionally it gives you a massive health boost. Once healed me by 13 hp, maybe more because that filled up my health that time. That's for members anyway, not sure on non-mems
4500.
Not as fast as DL360 G6
snail pace
15
There are many more factors involved than just hp. No way to answer that one with hp only.
do you mean HP level? you can buy HP ups, which raise the base HP of you're Pokemon at the Veilstone Department store.
50 to 60
165 hp
Answer now.
A 6 hp outboard will go about fast enough to plane a 10 ft. aluminum boat, with one passenger aboard.