yes
After the battle ends the Pokemon will still evolve however you will have to revive it if you still want to use it.
weakest is definitely jolteon. i recommend a fire type such as moltres if you can catch it, it is at the peak of mt. ember on one island and doesnt flee from you, however it is still extremely hard to catch
No , once it faints , it will not reappear , unless you save the game right before you make it faint .
well assuming you still want a Pokemon to use the HM Fly... i would suggest a flying typed Pokemon. Like Pigeot, or Spearow. Or you can take advantage of one of the legendaries you can catch in the game. If your playing Heartgold or Soul Silver, you can get one of the legendary bird Pokemon. Articuno, Moltres, or Zapdos. If you playing Pokemon Platinum/5th Gen. you can catch Pokemon like Starly, or Golbat. Specify your question in whichever game, and i can help you out more than I am right now.
yes
If you beat Dialga and Dialga faints, you can no longer catch it.
Attempt to catch?: When you spot the Pokemon, save in the place Terrakion is and if he faints start over (Reset DSi or turn off DS and your still in the place you saved at)............... he disappears when he faints.
You will only have one chance to catch Lugia so if you make it faint, you will not be able to catch it again. However, if your whole party faints, you will go back to the Pokemon center and you can battle it again.If you failed to catch Lugia, you can still trade for it.
You can catch Lugia when you get to the top of Citadark Isle. If you still have the masterball now is the time to use it. Then after you catch Lugia you battle Greevil and he has Torous, Exectutor, Rydon, Articuno, Zapdos, and Moltres. Hope I helped!!!
You find it in the Silver cave. You hafta to have surf, rockclimb, and maybe strength to get to moltres.i stumbled upon him unprepared but i still got him lol-Dylanmt. MortarThe very top of mt. silver
In heartgold, if ho-oh faints after you battle it, you still have a chance to catch it. Come back to the Bell Tower after you beat the elite 4. It will be there. If you defeat it then, beat the elite 4 again.
Moltres isn't in Sapphire. You can still get Moltres in Sapphire, but you'll have to trade. Other GBA games that contain Sapphire are FireRed/LeafGreen. There you can find Moltres at Mountain Ember.
You can always fight the Elite Four again. That allows you to find Mewtwo again. It worked for me in Pokemon X. It is best to save before you make it faint. Do so BEFORE you enter their caves! SAVE BEFORE BATTLING LEGENDARIES.
moltres is the easiest of the 3 birds. took me 3 ultra balls. use weak moves so you get him in the red and dont kill him. also if he is paralysed, poisened, asleep they are easier still to catch, but dont poison him
After the battle ends the Pokemon will still evolve however you will have to revive it if you still want to use it.
yes, once you leave the dungeon it gets revived and healed