You have to be the same Style as the element (i.e., Wood to use Gaia Blade, Fire to use Salamander).
yes, if you have battle network 4 red sun or blue moon (PAL or USA version) and you have a EXE 4.5 battlechip gate you can play operation battle, there for you must have Navi Chips (only released like exe 4.5 in Japan, or you can buy them on Ebay) and battle chips.
http://tartarus.rpgclassics.com/mmbn4/walkthrough23a.shtml
The area in the Hospital comp. accesible through the beach area Id say the hospital.
You can find it where the navi who gives you c slider. Which you need an unclocker for ( The navi is in Sharo area where all the arrows are)
who's blue. Whatever here's how you have to get 7 gym badges in kanto then he'll battle you.
Trade.
yes, if you have battle network 4 red sun or blue moon (PAL or USA version) and you have a EXE 4.5 battlechip gate you can play operation battle, there for you must have Navi Chips (only released like exe 4.5 in Japan, or you can buy them on Ebay) and battle chips.
I went from aqua shield to elecbug to heatguts. Just use a different method of attack and element of chips. Use mostly Protective attacks: you get a shield style. Use a lot of Navi chips: you get team style. Fight while having a bug in the navicust: bug style. Using the Mega buster A LOT: Guts style. Mostly fire chips give heat styles; elec chips give elec styles etc.
Blue moon or red sun?
no
http://tartarus.rpgclassics.com/mmbn4/walkthrough23a.shtml
There are various Grass stage chips at certain netshops. Likely places to look: Beach Square, Yoka Square, Sci-Lab Square. Not ACDC Square . . . I think.
supercheats.com
No, it's not.
Go to the Under Square.
The duration of Blue Chips is 1.8 hours.
Shadow Fire? No idea why you'd want that, but to get Shadow, use an Invis or Mole chip EVERY SINGLE BATTLE. As for Fire, just cross your fingers. It's ENTIRELY random. Using fire chips will NOT make you get a fire style.